Josh Boyer 700870119f x86, efi: Don't map Boot Services on i386 ... Add patch to fix 32bit EFI service mapping (rhbz 726701) Multiple people are reporting hitting the following WARNING on i386, WARNING: at arch/x86/mm/ioremap.c:102 __ioremap_caller+0x3d3/0x440() Modules linked in: Pid: 0, comm: swapper Not tainted 3.9.0-rc7+ #95 Call Trace: [<c102b6af>] warn_slowpath_common+0x5f/0x80 [<c1023fb3>] ? __ioremap_caller+0x3d3/0x440 [<c1023fb3>] ? __ioremap_caller+0x3d3/0x440 [<c102b6ed>] warn_slowpath_null+0x1d/0x20 [<c1023fb3>] __ioremap_caller+0x3d3/0x440 [<c106007b>] ? get_usage_chars+0xfb/0x110 [<c102d937>] ? vprintk_emit+0x147/0x480 [<c1418593>] ? efi_enter_virtual_mode+0x1e4/0x3de [<c102406a>] ioremap_cache+0x1a/0x20 [<c1418593>] ? efi_enter_virtual_mode+0x1e4/0x3de [<c1418593>] efi_enter_virtual_mode+0x1e4/0x3de [<c1407984>] start_kernel+0x286/0x2f4 [<c1407535>] ? repair_env_string+0x51/0x51 [<c1407362>] i386_start_kernel+0x12c/0x12f Due to the workaround described in commit 916f676f8 ("x86, efi: Retain boot service code until after switching to virtual mode") EFI Boot Service regions are mapped for a period during boot. Unfortunately, with the limited size of the i386 direct kernel map it's possible that some of the Boot Service regions will not be directly accessible, which causes them to be ioremap()'d, triggering the above warning as the regions are marked as E820_RAM in the e820 memmap. There are currently only two situations where we need to map EFI Boot Service regions, 1. To workaround the firmware bug described in 916f676f8 2. To access the ACPI BGRT image but since we haven't seen an i386 implementation that requires either, this simple fix should suffice for now. [ Added to changelog - Matt ] Reported-by: Bryan O'Donoghue <bryan.odonoghue.lkml@nexus-software.ie> Acked-by: Tom Zanussi <tom.zanussi@intel.com> Acked-by: Darren Hart <dvhart@linux.intel.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Josh Boyer <jwboyer@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>		2013-09-18 14:42:33 +01:00
..
boot	Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-04 09:38:10 -07:00
configs
crypto	Reinstate "crypto: crct10dif - Wrap crc_t10dif function all to use crypto transform framework"	2013-09-07 12:56:26 +10:00
ia32	Merge branch 'x86-smap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-04 11:08:32 -07:00
include	mm: make sure _PAGE_SWP_SOFT_DIRTY bit is not set on present pte	2013-09-11 15:58:06 -07:00
kernel	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-12 10:44:54 -07:00
kvm	shrinker: convert remaining shrinkers to count/scan API	2013-09-10 18:56:32 -04:00
lguest	lguest: fix GPF in guest when using gdb.	2013-09-06 08:09:28 +09:30
lib	Merge branch 'x86-smap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-04 11:08:32 -07:00
math-emu
mm	x86: finish user fault error path with fatal signal	2013-09-12 15:38:01 -07:00
net
oprofile
pci
platform	x86, efi: Don't map Boot Services on i386	2013-09-18 14:42:33 +01:00
power
realmode
syscalls
tools	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-04 08:39:38 -07:00
um	um: prctl: Do not include linux/ptrace.h	2013-09-07 10:57:11 +02:00
vdso
video
xen	Bug-fixes:	2013-09-10 20:07:04 -07:00
.gitignore
Kbuild
Kconfig	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
Kconfig.cpu
Kconfig.debug
Makefile
Makefile_32.cpu
Makefile.um