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@ -1,24 +1,57 @@
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From f72d640713d01b3b704c6e84ab49b62f19fc9c22 Mon Sep 17 00:00:00 2001
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From: Kyle McMartin <kyle@phobos.i.jkkm.org>
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Date: Tue, 30 Mar 2010 00:16:25 -0400
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Subject: [PATCH] dev-crash-driver.patch
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From 9fcd8dd1ccc20ea8d466d48e887e92b832e22d56 Mon Sep 17 00:00:00 2001
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From: Kyle McMartin <kyle@dreadnought.bos.jkkm.org>
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Date: Tue, 5 Nov 2013 13:16:00 -0500
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Subject: [PATCH] crash-driver
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---
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arch/ia64/include/asm/crash.h | 90 +++++++++++++++++++++++++++++
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arch/ia64/kernel/ia64_ksyms.c | 3 +
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arch/x86/include/asm/crash.h | 75 ++++++++++++++++++++++++
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arch/x86/mm/ioremap.c | 2 +
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drivers/char/Kconfig | 3 +
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drivers/char/Makefile | 2 +
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drivers/char/crash.c | 128 +++++++++++++++++++++++++++++++++++++++++
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7 files changed, 303 insertions(+), 0 deletions(-)
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arch/arm/include/asm/crash.h | 6 ++
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arch/arm64/include/asm/crash.h | 6 ++
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arch/ia64/include/asm/crash.h | 90 +++++++++++++++++++++++++++
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arch/ia64/kernel/ia64_ksyms.c | 3 +
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arch/powerpc/include/asm/crash.h | 6 ++
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arch/s390/include/asm/crash.h | 60 ++++++++++++++++++
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arch/x86/include/asm/crash.h | 6 ++
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drivers/char/Kconfig | 3 +
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drivers/char/Makefile | 2 +
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drivers/char/crash.c | 128 +++++++++++++++++++++++++++++++++++++++
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include/asm-generic/crash.h | 72 ++++++++++++++++++++++
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11 files changed, 382 insertions(+)
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create mode 100644 arch/arm/include/asm/crash.h
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create mode 100644 arch/arm64/include/asm/crash.h
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create mode 100644 arch/ia64/include/asm/crash.h
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create mode 100644 arch/powerpc/include/asm/crash.h
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create mode 100644 arch/s390/include/asm/crash.h
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create mode 100644 arch/x86/include/asm/crash.h
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create mode 100644 drivers/char/crash.c
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create mode 100644 include/asm-generic/crash.h
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diff --git a/arch/arm/include/asm/crash.h b/arch/arm/include/asm/crash.h
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new file mode 100644
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index 0000000..1d2e537
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--- /dev/null
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+++ b/arch/arm/include/asm/crash.h
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@@ -0,0 +1,6 @@
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+#ifndef _ARM_CRASH_H
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+#define _ARM_CRASH_H
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+
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+#include <asm-generic/crash.h>
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+
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+#endif /* _ARM_CRASH_H */
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diff --git a/arch/arm64/include/asm/crash.h b/arch/arm64/include/asm/crash.h
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new file mode 100644
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index 0000000..a7fcc28
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--- /dev/null
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+++ b/arch/arm64/include/asm/crash.h
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@@ -0,0 +1,6 @@
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+#ifndef _ARM64_CRASH_H
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+#define _ARM64_CRASH_H
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+
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+#include <asm-generic/crash.h>
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+
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+#endif /* _ARM64_CRASH_H */
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diff --git a/arch/ia64/include/asm/crash.h b/arch/ia64/include/asm/crash.h
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new file mode 100644
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index 0000000..541af84
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index 0000000..28bd955
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--- /dev/null
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+++ b/arch/ia64/include/asm/crash.h
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@@ -0,0 +1,90 @@
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@ -68,7 +101,7 @@ index 0000000..541af84
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+ return NULL;
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+ }
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+
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+ switch (type = efi_mem_type(offset))
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+ switch (type = efi_mem_type(offset))
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+ {
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+ case EFI_LOADER_CODE:
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+ case EFI_LOADER_DATA:
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@ -79,7 +112,7 @@ index 0000000..541af84
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+
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+ default:
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+ printk(KERN_INFO
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+ "crash memory driver: invalid memory type for %lx: %d\n",
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+ "crash memory driver: invalid memory type for %lx: %d\n",
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+ offset, type);
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+ return NULL;
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+ }
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@ -96,7 +129,7 @@ index 0000000..541af84
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+
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+ if (!page->virtual) {
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+ printk(KERN_INFO
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+ "crash memory driver: offset: %lx page: %lx page->virtual: NULL\n",
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+ "crash memory driver: offset: %lx page: %lx page->virtual: NULL\n",
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+ offset, (unsigned long)page);
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+ return NULL;
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+ }
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@ -104,8 +137,8 @@ index 0000000..541af84
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+ return (page->virtual + (offset & (PAGE_SIZE-1)));
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+}
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+
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+static inline void unmap_virtual(struct page *page)
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+{
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+static inline void unmap_virtual(struct page *page)
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+{
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+ return;
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+}
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+
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@ -113,7 +146,7 @@ index 0000000..541af84
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+
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+#endif /* _ASM_IA64_CRASH_H */
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diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
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index 7f4a0ed..552fe24 100644
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index 5b7791d..aee4b87 100644
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--- a/arch/ia64/kernel/ia64_ksyms.c
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+++ b/arch/ia64/kernel/ia64_ksyms.c
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@@ -84,6 +84,9 @@ EXPORT_SYMBOL(ia64_save_scratch_fpregs);
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@ -126,50 +159,47 @@ index 7f4a0ed..552fe24 100644
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#if defined(CONFIG_IA64_ESI) || defined(CONFIG_IA64_ESI_MODULE)
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extern void esi_call_phys (void);
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EXPORT_SYMBOL_GPL(esi_call_phys);
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diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h
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diff --git a/arch/powerpc/include/asm/crash.h b/arch/powerpc/include/asm/crash.h
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new file mode 100644
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index 0000000..dfcc006
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index 0000000..daa8c4d
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--- /dev/null
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+++ b/arch/x86/include/asm/crash.h
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@@ -0,0 +1,73 @@
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+#ifndef _ASM_I386_CRASH_H
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+#define _ASM_I386_CRASH_H
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+++ b/arch/powerpc/include/asm/crash.h
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@@ -0,0 +1,6 @@
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+#ifndef _PPC64_CRASH_H
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+#define _PPC64_CRASH_H
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+
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+/*
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+ * linux/include/asm-i386/crash.h
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+ *
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+ * Copyright (c) 2004 Red Hat, Inc. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2, or (at your option)
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+ * any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ */
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+#include <asm-generic/crash.h>
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+
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+#endif /* _PPC64_CRASH_H */
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diff --git a/arch/s390/include/asm/crash.h b/arch/s390/include/asm/crash.h
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new file mode 100644
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index 0000000..552be5e
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--- /dev/null
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+++ b/arch/s390/include/asm/crash.h
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@@ -0,0 +1,60 @@
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+#ifndef _S390_CRASH_H
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+#define _S390_CRASH_H
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+
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+#ifdef __KERNEL__
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+
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+#include <linux/mm.h>
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+#include <linux/highmem.h>
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+#include <asm/mmzone.h>
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+
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+static inline void *
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+map_virtual(u64 offset, struct page **pp)
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+/*
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+ * For swapped prefix pages get bounce buffer using xlate_dev_mem_ptr()
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+ */
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+static inline void *map_virtual(u64 offset, struct page **pp)
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+{
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+ struct page *page;
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+ unsigned long pfn;
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+ void *vaddr;
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+
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+ pfn = (unsigned long)(offset >> PAGE_SHIFT);
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+ vaddr = xlate_dev_mem_ptr(offset);
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+ pfn = ((unsigned long) vaddr) >> PAGE_SHIFT;
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+ if ((unsigned long) vaddr != offset)
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+ page = pfn_to_page(pfn);
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+ else
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+ page = NULL;
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+
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+ if (!page_is_ram(pfn)) {
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+ printk(KERN_INFO
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@ -183,30 +213,44 @@ index 0000000..dfcc006
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+ return NULL;
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+ }
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+
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+ page = pfn_to_page(pfn);
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+
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+ vaddr = kmap(page);
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+ if (!vaddr) {
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+ printk(KERN_INFO
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+ "crash memory driver: pfn: %lx kmap(page: %lx) failed\n",
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+ pfn, (unsigned long)page);
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+ return NULL;
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+ }
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+
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+ *pp = page;
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+ return (vaddr + (offset & (PAGE_SIZE-1)));
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+ return vaddr;
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+}
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+
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+static inline void unmap_virtual(struct page *page)
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+{
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+ kunmap(page);
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+/*
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+ * Free bounce buffer if necessary
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+ */
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+static inline void unmap_virtual(struct page *page)
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+{
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+ void *vaddr;
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+
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+ if (page) {
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+ /*
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+ * Because for bounce buffers vaddr will never be 0
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+ * unxlate_dev_mem_ptr() will always free the bounce buffer.
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+ */
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+ vaddr = (void *)(page_to_pfn(page) << PAGE_SHIFT);
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+ unxlate_dev_mem_ptr(0, vaddr);
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+ }
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+}
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+
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+#endif /* __KERNEL__ */
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+
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+#endif /* _ASM_I386_CRASH_H */
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+#endif /* _S390_CRASH_H */
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diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h
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new file mode 100644
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index 0000000..27a4156
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--- /dev/null
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+++ b/arch/x86/include/asm/crash.h
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@@ -0,0 +1,6 @@
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+#ifndef _X86_CRASH_H
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+#define _X86_CRASH_H
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+
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+#include <asm-generic/crash.h>
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+
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+#endif /* _X86_CRASH_H */
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diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
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index 423fd56..e04a561 100644
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index 1421997..72a8b74 100644
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--- a/drivers/char/Kconfig
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+++ b/drivers/char/Kconfig
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@@ -4,6 +4,9 @@
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@ -220,10 +264,10 @@ index 423fd56..e04a561 100644
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config DEVKMEM
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diff --git a/drivers/char/Makefile b/drivers/char/Makefile
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index 32762ba..3d5d525 100644
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index 7ff1d0d..3ed67af 100644
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--- a/drivers/char/Makefile
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+++ b/drivers/char/Makefile
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|
|
@@ -65,3 +65,5 @@ obj-$(CONFIG_JS_RTC) += js-rtc.o
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@@ -62,3 +62,5 @@ obj-$(CONFIG_JS_RTC) += js-rtc.o
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|
|
|
js-rtc-y = rtc.o
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|
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|
|
|
|
|
|
obj-$(CONFIG_TILE_SROM) += tile-srom.o
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|
|
@ -231,7 +275,7 @@ index 32762ba..3d5d525 100644
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|
|
+obj-$(CONFIG_CRASH) += crash.o
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diff --git a/drivers/char/crash.c b/drivers/char/crash.c
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|
|
new file mode 100644
|
|
|
|
|
index 0000000..e5437de
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|
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|
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index 0000000..a142bb3
|
|
|
|
|
--- /dev/null
|
|
|
|
|
+++ b/drivers/char/crash.c
|
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|
|
@@ -0,0 +1,128 @@
|
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|
|
@ -276,7 +320,7 @@ index 0000000..e5437de
|
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|
|
+ * access to physical memory.
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+ */
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+
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+static loff_t
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|
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|
+static loff_t
|
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|
+crash_llseek(struct file * file, loff_t offset, int orig)
|
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|
|
|
+{
|
|
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+ switch (orig) {
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|
|
@ -292,7 +336,7 @@ index 0000000..e5437de
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+}
|
|
|
|
|
+
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|
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|
|
+/*
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|
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|
|
+ * Determine the page address for an address offset value,
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|
|
|
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+ * Determine the page address for an address offset value,
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|
|
|
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+ * get a virtual address for it, and copy it out.
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|
|
|
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+ * Accesses must fit within a page.
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|
|
|
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+ */
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|
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@ -305,7 +349,7 @@ index 0000000..e5437de
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+ ssize_t read;
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+
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+ offset = *poff;
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+ if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT)
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+ if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT)
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+ return -EINVAL;
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+
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+ vaddr = map_virtual(offset, &page);
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@ -342,11 +386,11 @@ index 0000000..e5437de
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+
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+ ret = misc_register(&crash_dev);
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+ if (ret) {
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+ printk(KERN_ERR
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+ printk(KERN_ERR
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+ "crash memory driver: cannot misc_register (MISC_DYNAMIC_MINOR)\n");
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+ goto out;
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+ }
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+
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+
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+ ret = 0;
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+ printk(KERN_INFO "crash memory driver: version %s\n", CRASH_VERSION);
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+out:
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@ -363,6 +407,84 @@ index 0000000..e5437de
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+module_exit(crash_cleanup_module);
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+
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+MODULE_LICENSE("GPL");
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diff --git a/include/asm-generic/crash.h b/include/asm-generic/crash.h
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new file mode 100644
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index 0000000..8a0a69a
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--- /dev/null
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+++ b/include/asm-generic/crash.h
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@@ -0,0 +1,72 @@
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+#ifndef __CRASH_H__
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+#define __CRASH_H__
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+
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+/*
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+ * include/linux/crash.h
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+ *
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+ * Copyright (c) 2013 Red Hat, Inc. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2, or (at your option)
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+ * any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ */
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+
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+#ifdef __KERNEL__
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+
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+#include <linux/mm.h>
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+#include <linux/highmem.h>
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+
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+static inline void *
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+map_virtual(u64 offset, struct page **pp)
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+{
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+ struct page *page;
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|
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+ unsigned long pfn;
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+ void *vaddr;
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+
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|
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+ pfn = (unsigned long)(offset >> PAGE_SHIFT);
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+
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+ if (!page_is_ram(pfn)) {
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|
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+ printk(KERN_INFO
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+ "crash memory driver: !page_is_ram(pfn: %lx)\n", pfn);
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+ return NULL;
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+ }
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+
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+ if (!pfn_valid(pfn)) {
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|
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+ printk(KERN_INFO
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+ "crash memory driver: invalid pfn: %lx )\n", pfn);
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+ return NULL;
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|
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+ }
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+
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|
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+ page = pfn_to_page(pfn);
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+
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|
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+ vaddr = kmap(page);
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|
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+ if (!vaddr) {
|
|
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|
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+ printk(KERN_INFO
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|
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|
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+ "crash memory driver: pfn: %lx kmap(page: %lx) failed\n",
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+ pfn, (unsigned long)page);
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+ return NULL;
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|
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+ }
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+
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|
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+ *pp = page;
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|
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+ return (vaddr + (offset & (PAGE_SIZE-1)));
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+}
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+
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+static inline void unmap_virtual(struct page *page)
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|
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+{
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|
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+ kunmap(page);
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|
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+}
|
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+
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|
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+#endif /* __KERNEL__ */
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+
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|
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+#endif /* __CRASH_H__ */
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--
|
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1.7.6
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1.8.3.1
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