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5fbbc25a99
linux/arch/x86
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David Woodhouse 5fbbc25a99 x86, boot: Fix word-size assumptions in has_eflag() inline asm 
Commit dd78b97367 ("x86, boot: Move CPU
flags out of cpucheck") introduced ambiguous inline asm in the
has_eflag() function. In 16-bit mode want the instruction to be
'pushfl', but we just say 'pushf' and hope the compiler does what we
wanted.

When building with 'clang -m16', it won't, because clang doesn't use
the horrid '.code16gcc' hack that even 'gcc -m16' uses internally.

Say what we mean and don't make the compiler make assumptions.

[ hpa: ideally we would be able to use the gcc %zN construct here, but
  that is broken for 64-bit integers in gcc < 4.5.

  The code with plain "pushf/popf" is fine for 32- or 64-bit mode, but
  not for 16-bit mode; in 16-bit mode those are 16-bit instructions in
  .code16 mode, and 32-bit instructions in .code16gcc mode. ]

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Link: http://lkml.kernel.org/r/1391079628.26079.82.camel@shinybook.infradead.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-01-30 08:04:32 -08:00
..
boot x86, boot: Fix word-size assumptions in has_eflag() inline asm 2014-01-30 08:04:32 -08:00
configs x86, defconfig: Add DEVTMPFS and DEVTMPFS_MOUNT to *86*_defconfig 2013-11-04 20:01:55 -08:00
crypto crypto: sha256_ssse3 - also test for BMI2 2013-10-07 14:17:10 +08:00
ia32 constify copy_siginfo_to_user{,32}() 2013-11-09 00:16:29 -05:00
include Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 14:45:50 -08:00
kernel Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 14:45:50 -08:00
kvm kvm: x86: fix apic_base enable check 2014-01-15 13:42:14 +01:00
lguest lguest: fix GPF in guest when using gdb. 2013-09-06 08:09:28 +09:30
lib Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 12:03:57 -08:00
math-emu
mm Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 14:45:50 -08:00
net bpf: do not use reciprocal divide 2014-01-15 17:02:08 -08:00
oprofile perf: Fix arch_perf_out_copy_user default 2013-11-06 12:34:25 +01:00
pci Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 12:06:50 -08:00
platform Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 12:06:50 -08:00
power x86, asmlinkage, power: Make various symbols used by the suspend asm code visible 2013-08-06 14:21:03 -07:00
realmode Merge commit 'f4bcd8ccddb02833340652e9f46f5127828eb79d' into x86/build 2014-01-29 09:07:00 -08:00
syscalls sched: Add new scheduler syscalls to support an extended scheduling parameters ABI 2014-01-13 13:41:04 +01:00
tools Merge commit 'f4bcd8ccddb02833340652e9f46f5127828eb79d' into x86/build 2014-01-29 09:07:00 -08:00
um um, x86: Fix vDSO build 2014-01-12 16:47:31 +01:00
vdso Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 12:03:57 -08:00
video
xen Features: 2013-11-15 13:34:37 +09:00
.gitignore
Kbuild
Kconfig Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 14:45:50 -08:00
Kconfig.cpu
Kconfig.debug x86/efi: Add EFI framebuffer earlyprintk support 2013-10-28 18:09:58 +00:00
Makefile Merge commit 'f4bcd8ccddb02833340652e9f46f5127828eb79d' into x86/build 2014-01-29 09:07:00 -08:00
Makefile_32.cpu
Makefile.um