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| author | Ingo Molnar <mingo@kernel.org> | 2015-04-03 12:02:02 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:10 +0200 |
| commit | 97185c95f7ab7f752473c34672dab0925758094b (patch) | |
| tree | 287e1d57d678656ada4da43572d1defef7d3ae7e /arch/x86/kernel/xsave.c | |
| parent | x86/fpu: Remove stale init_fpu() prototype (diff) | |
| download | linux-97185c95f7ab7f752473c34672dab0925758094b.tar.xz linux-97185c95f7ab7f752473c34672dab0925758094b.zip | |
x86/fpu: Split an fpstate_alloc_init() function out of init_fpu()
Most init_fpu() users don't want the register-saving aspect of the
function, they are calling it for 'current' and when FPU registers
are not allocated and initialized yet.
Split out a simplified API that does just that (and add debug-checks
for these conditions): fpstate_alloc_init().
Use it where appropriate.
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/xsave.c')
| -rw-r--r-- | arch/x86/kernel/xsave.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 87a815b85f3e..a977cdd03825 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -349,7 +349,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size) if (!access_ok(VERIFY_READ, buf, size)) return -EACCES; - if (!used_math() && init_fpu(tsk)) + if (!used_math() && fpstate_alloc_init(tsk)) return -1; if (!static_cpu_has(X86_FEATURE_FPU)) |