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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-06 16:24:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-06 16:24:17 -0700 |
| commit | 66cd55d2b903643cbd019ef97a5305d9428d3865 (patch) | |
| tree | 454a5af22b1aaf8fe62689974342a784f6f38822 /arch/x86/include/asm/cpufeature.h | |
| parent | 75cb5fdce29c77ec54db45f0c6be7cc5715f8e15 (diff) | |
| parent | 3b770a2128423a687e6e9c57184a584fb4ba4c77 (diff) | |
| download | linux-66cd55d2b903643cbd019ef97a5305d9428d3865.tar.bz2 | |
Merge branch 'x86-alternatives-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-alternatives-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, alternatives: BUG on encountering an invalid CPU feature number
x86, alternatives: Fix one more open-coded 8-bit alternative number
x86, alternatives: Use 16-bit numbers for cpufeature index
Diffstat (limited to 'arch/x86/include/asm/cpufeature.h')
| -rw-r--r-- | arch/x86/include/asm/cpufeature.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index 0b205b8a4308..781a50b29a49 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -302,7 +302,7 @@ extern const char * const x86_power_flags[32]; * patch the target code for additional performance. * */ -static __always_inline __pure bool __static_cpu_has(u8 bit) +static __always_inline __pure bool __static_cpu_has(u16 bit) { #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) asm goto("1: jmp %l[t_no]\n" @@ -311,11 +311,11 @@ static __always_inline __pure bool __static_cpu_has(u8 bit) _ASM_ALIGN "\n" _ASM_PTR "1b\n" _ASM_PTR "0\n" /* no replacement */ - " .byte %P0\n" /* feature bit */ + " .word %P0\n" /* feature bit */ " .byte 2b - 1b\n" /* source len */ " .byte 0\n" /* replacement len */ - " .byte 0xff + 0 - (2b-1b)\n" /* padding */ ".previous\n" + /* skipping size check since replacement size = 0 */ : : "i" (bit) : : t_no); return true; t_no: @@ -329,10 +329,12 @@ static __always_inline __pure bool __static_cpu_has(u8 bit) _ASM_ALIGN "\n" _ASM_PTR "1b\n" _ASM_PTR "3f\n" - " .byte %P1\n" /* feature bit */ + " .word %P1\n" /* feature bit */ " .byte 2b - 1b\n" /* source len */ " .byte 4f - 3f\n" /* replacement len */ - " .byte 0xff + (4f-3f) - (2b-1b)\n" /* padding */ + ".previous\n" + ".section .discard,\"aw\",@progbits\n" + " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */ ".previous\n" ".section .altinstr_replacement,\"ax\"\n" "3: movb $1,%0\n" @@ -348,7 +350,7 @@ static __always_inline __pure bool __static_cpu_has(u8 bit) ( \ __builtin_constant_p(boot_cpu_has(bit)) ? \ boot_cpu_has(bit) : \ - (__builtin_constant_p(bit) && !((bit) & ~0xff)) ? \ + __builtin_constant_p(bit) ? \ __static_cpu_has(bit) : \ boot_cpu_has(bit) \ ) |