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Linux 3.3-rc1-git6 (upstream 6bc2b95ee602659c1be6fac0f6aadeb0c5c29a5d) 

- Add patch from Kay Sievers for udlfb device removal
- utrace patch to allow calling internal functions from atomic context from
  Oleg Nesterov
This commit is contained in:
Josh Boyer 2012-01-30 16:37:49 -05:00
parent d47884a9de
commit cf9048c9c4
3 changed files with 199 additions and 1 deletions
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12
kernel.spec
View File

@ -87,7 +87,7 @@ Summary: The Linux kernel
# The rc snapshot level
%define rcrev 1
# The git snapshot level
%define gitrev 5
%define gitrev 6
# Set rpm version accordingly
%define rpmversion 3.%{upstream_sublevel}.0
%endif
@ -741,6 +741,8 @@ Patch21087: fs-Inval-cache-for-parent-block-device-if-fsync-called-on-part.patch
Patch21091: kmemleak.patch
Patch21092: udlfb-remove-sysfs-framebuffer-device-with-USB-disconnect.patch
# compat-wireless patches
Patch50000: compat-wireless-config-fixups.patch
Patch50001: compat-wireless-pr_fmt-warning-avoidance.patch
@ -1432,6 +1434,8 @@ ApplyPatch KVM-x86-fix-missing-checks-in-syscall-emulation.patch
ApplyPatch kmemleak.patch
ApplyPatch udlfb-remove-sysfs-framebuffer-device-with-USB-disconnect.patch
#rhbz 783211
ApplyPatch fs-Inval-cache-for-parent-block-device-if-fsync-called-on-part.patch
@ -2281,6 +2285,12 @@ fi
# ||----w |
# || ||
%changelog
* Mon Jan 30 2012 Josh Boyer <jwboyer@redhat.com> - 3.3.0-0.rc1.git6.1
- Linux 3.3-rc1-git6 (upstream 6bc2b95ee602659c1be6fac0f6aadeb0c5c29a5d)
- Add patch from Kay Sievers for udlfb device removal
- utrace patch to allow calling internal functions from atomic context from
Oleg Nesterov
* Mon Jan 30 2012 John W. Linville <linville@redhat.com>
- ath9k: use WARN_ON_ONCE in ath_rc_get_highest_rix

118
udlfb-remove-sysfs-framebuffer-device-with-USB-disconnect.patch Normal file
View File

@ -0,0 +1,118 @@
From 92a9c19a89af2ca219fbb040a0059f414a4b7223 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Sat, 28 Jan 2012 19:57:46 +0000
Subject: [PATCH] udlfb: remove sysfs framebuffer device with USB
.disconnect()
The USB graphics card driver delays the unregistering of the framebuffer
device to a workqueue, which breaks the userspace visible remove uevent
sequence. Recent userspace tools started to support USB graphics card
hotplug out-of-the-box and rely on proper events sent by the kernel.
The framebuffer device is a direct child of the USB interface which is
removed immediately after the USB .disconnect() callback. But the fb device
in /sys stays around until its final cleanup, at a time where all the parent
devices have been removed already.
To work around that, we remove the sysfs fb device directly in the USB
.disconnect() callback and leave only the cleanup of the internal fb
data to the delayed work.
Before:
add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb)
add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb)
add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/graphics/fb0 (graphics)
remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb)
remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb)
remove /2-1.2:1.0/graphics/fb0 (graphics)
After:
add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb)
add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb)
add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/graphics/fb1 (graphics)
remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/graphics/fb1 (graphics)
remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb)
remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb)
Cc: stable@vger.kernel.org
Tested-by: Bernie Thompson <bernie@plugable.com>
Acked-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
---
drivers/video/fbmem.c | 18 +++++++++++++++++-
drivers/video/udlfb.c | 2 +-
include/linux/fb.h | 1 +
3 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index ac9141b..c6ce416 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1665,6 +1665,7 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
if (ret)
return -EINVAL;
+ unlink_framebuffer(fb_info);
if (fb_info->pixmap.addr &&
(fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
kfree(fb_info->pixmap.addr);
@@ -1672,7 +1673,6 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
registered_fb[i] = NULL;
num_registered_fb--;
fb_cleanup_device(fb_info);
- device_destroy(fb_class, MKDEV(FB_MAJOR, i));
event.info = fb_info;
fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
@@ -1681,6 +1681,22 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
return 0;
}
+int unlink_framebuffer(struct fb_info *fb_info)
+{
+ int i;
+
+ i = fb_info->node;
+ if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
+ return -EINVAL;
+
+ if (fb_info->dev) {
+ device_destroy(fb_class, MKDEV(FB_MAJOR, i));
+ fb_info->dev = NULL;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(unlink_framebuffer);
+
void remove_conflicting_framebuffers(struct apertures_struct *a,
const char *name, bool primary)
{
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c
index a197731..a40c05e 100644
--- a/drivers/video/udlfb.c
+++ b/drivers/video/udlfb.c
@@ -1739,7 +1739,7 @@ static void dlfb_usb_disconnect(struct usb_interface *interface)
for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++)
device_remove_file(info->dev, &fb_device_attrs[i]);
device_remove_bin_file(info->dev, &edid_attr);
-
+ unlink_framebuffer(info);
usb_set_intfdata(interface, NULL);
/* if clients still have us open, will be freed on last close */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index c18122f..a395b8c 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -1003,6 +1003,7 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
/* drivers/video/fbmem.c */
extern int register_framebuffer(struct fb_info *fb_info);
extern int unregister_framebuffer(struct fb_info *fb_info);
+extern int unlink_framebuffer(struct fb_info *fb_info);
extern void remove_conflicting_framebuffers(struct apertures_struct *a,
const char *name, bool primary);
extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
--
1.7.6.5

70
utrace.patch
View File

@ -4683,3 +4683,73 @@ index 0000000..c817a46
+ seq_printf(m, "Utrace:\t%lx\n", p->utrace_flags);
+}
Add the new UTRACE_ATTACH_ATOMIC flag for utrace_attach_task().
If it is set, UTRACE_ATTACH_CREATE uses GFP_ATOMIC for memory
allocations and thus it can be used in atomic context.
Suggested-by: Mark Wielaard <mjw@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
include/linux/utrace.h | 1 +
kernel/utrace.c | 12 ++++++++----
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/linux/utrace.h b/include/linux/utrace.h
index f37373b..46959af 100644
--- a/include/linux/utrace.h
+++ b/include/linux/utrace.h
@@ -317,6 +317,7 @@ static inline enum utrace_syscall_action utrace_syscall_action(u32 action)
#define UTRACE_ATTACH_MATCH_MASK 0x000f
#define UTRACE_ATTACH_CREATE 0x0010 /* Attach a new engine. */
#define UTRACE_ATTACH_EXCLUSIVE 0x0020 /* Refuse if existing match. */
+#define UTRACE_ATTACH_ATOMIC 0x0040 /* For _CREATE, don't sleep */
/**
* struct utrace_engine - per-engine structure
diff --git a/kernel/utrace.c b/kernel/utrace.c
index c817a46..a169e1b 100644
--- a/kernel/utrace.c
+++ b/kernel/utrace.c
@@ -113,9 +113,9 @@ void task_utrace_unlock(struct task_struct *task)
*
* This returns false only in case of a memory allocation failure.
*/
-static bool utrace_task_alloc(struct task_struct *task)
+static bool utrace_task_alloc(struct task_struct *task, gfp_t gfp_flags)
{
- struct utrace *utrace = kmem_cache_zalloc(utrace_cachep, GFP_KERNEL);
+ struct utrace *utrace = kmem_cache_zalloc(utrace_cachep, gfp_flags);
if (unlikely(!utrace))
return false;
spin_lock_init(&utrace->lock);
@@ -295,6 +295,7 @@ struct utrace_engine *utrace_attach_task(
{
struct utrace *utrace = task_utrace_struct(target);
struct utrace_engine *engine;
+ gfp_t gfp_flags;
int ret;
if (!(flags & UTRACE_ATTACH_CREATE)) {
@@ -317,13 +318,16 @@ struct utrace_engine *utrace_attach_task(
*/
return ERR_PTR(-EPERM);
+ gfp_flags = (flags & UTRACE_ATTACH_ATOMIC)
+ ? GFP_ATOMIC : GFP_KERNEL;
+
if (!utrace) {
- if (unlikely(!utrace_task_alloc(target)))
+ if (unlikely(!utrace_task_alloc(target, gfp_flags)))
return ERR_PTR(-ENOMEM);
utrace = task_utrace_struct(target);
}
- engine = kmem_cache_alloc(utrace_engine_cachep, GFP_KERNEL);
+ engine = kmem_cache_alloc(utrace_engine_cachep, gfp_flags);
if (unlikely(!engine))
return ERR_PTR(-ENOMEM);
--
1.5.5.1