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| author | Ingo Molnar <mingo@elte.hu> | 2008-08-20 12:39:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-20 12:39:18 +0200 |
| commit | 170465ee7f5a9a2d0ac71285507e52642e040353 (patch) | |
| tree | dbca81f04cde9e625170abbd6a72555cfbeb194e /arch/x86/boot/main.c | |
| parent | 169ad16bb87c10a3f7c108bb7008ebc0270f617a (diff) | |
| parent | 1fca25427482387689fa27594c992a961d98768f (diff) | |
Merge branch 'linus' into x86/xen
Diffstat (limited to 'arch/x86/boot/main.c')
| -rw-r--r-- | arch/x86/boot/main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c index 2296164b54d..197421db1af 100644 --- a/arch/x86/boot/main.c +++ b/arch/x86/boot/main.c @@ -73,6 +73,11 @@ static void keyboard_set_repeat(void) */ static void query_ist(void) { + /* Some older BIOSes apparently crash on this call, so filter + it from machines too old to have SpeedStep at all. */ + if (cpu.level < 6) + return; + asm("int $0x15" : "=a" (boot_params.ist_info.signature), "=b" (boot_params.ist_info.command), |