Brian Gerst 2476f2fa20 x86/alternatives: Discard dynamic check after init ...

Move the code to do the dynamic check to the altinstr_aux
section so that it is discarded after alternatives have run and
a static branch has been chosen.

This way we're changing the dynamic branch from C code to
assembly, which makes it *substantially* smaller while avoiding
a completely unnecessary call to an out of line function.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
[ Changed it to do TESTB, as hpa suggested. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Young <dyoung@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: Laura Abbott <labbott@fedoraproject.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1452972124-7380-1-git-send-email-brgerst@gmail.com
Link: http://lkml.kernel.org/r/20160127084525.GC30712@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-01-30 11:22:22 +01:00

..

boot

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

configs

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2015-09-04 15:49:32 -07:00

crypto

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

entry

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

ia32

Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-11-03 21:05:40 -08:00

include

x86/alternatives: Discard dynamic check after init

2016-01-30 11:22:22 +01:00

kernel

x86/alternatives: Discard dynamic check after init

2016-01-30 11:22:22 +01:00

kvm

kvm: rename pfn_t to kvm_pfn_t

2016-01-15 17:56:32 -08:00

lguest

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-11 16:26:03 -08:00

lib

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

math-emu

Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-11-03 21:05:40 -08:00

mm

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

net

bpf, x86: detect/optimize loading 0 immediates

2015-12-18 16:04:51 -05:00

oprofile

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

pci

Merge tag 'pci-v4.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2016-01-21 11:52:16 -08:00

platform

Merge tag 'pm+acpi-4.5-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2016-01-12 20:25:09 -08:00

power

x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume

2015-11-26 10:04:53 +01:00

purgatory

…

ras

x86/ras/mce_amd_inj: Inject bank 4 errors on the NBC

2015-10-12 16:15:48 +02:00

realmode

UBSAN: run-time undefined behavior sanity checker

2016-01-20 17:09:18 -08:00

tools

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um

x86/cpufeature: Carve out X86_FEATURE_*

2016-01-30 11:22:17 +01:00

video

…

xen

Merge tag 'for-linus-4.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2016-01-12 13:05:36 -08:00

.gitignore

…

Kbuild

…

Kconfig

Merge branch 'akpm' (patches from Andrew)

2016-01-21 12:32:08 -08:00

Kconfig.cpu

x86/Kconfig/cpus: Fix/complete CPU type help texts

2015-10-21 11:12:56 +02:00

Kconfig.debug

x86/cpufeature: Replace the old static_cpu_has() with safe variant

2016-01-30 11:22:18 +01:00

Makefile

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2015-11-04 09:11:12 -08:00

Makefile_32.cpu

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Makefile.um

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