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| author | Ingo Molnar <mingo@kernel.org> | 2015-04-25 05:27:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:38 +0200 |
| commit | 26b1f5d05a81a0e60eed718d2d073f050b0afc8f (patch) | |
| tree | 110f58631c3d610d431efe0a1ee5092e5a621dba | |
| parent | 966ece619eaeae9b5cb6cede7fe6303b7031a51f (diff) | |
| download | blackbird-op-linux-26b1f5d05a81a0e60eed718d2d073f050b0afc8f.tar.gz blackbird-op-linux-26b1f5d05a81a0e60eed718d2d073f050b0afc8f.zip | |
x86/fpu: Make setup_init_fpu_buf() run-once explicitly
Remove the dependency on the init_xstate_buf == NULL check to
implement once-per-bootup logic in eager_fpu_init(), by making
setup_init_fpu_buf() run once per bootup explicitly.
This is in preparation to make init_xstate_buf statically
allocated.
The various boot-once quirks in the FPU init code will be removed
in a later cleanup stage.
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>
| -rw-r--r-- | arch/x86/kernel/fpu/xsave.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/x86/kernel/fpu/xsave.c b/arch/x86/kernel/fpu/xsave.c index adeab16655ae..d11b33514130 100644 --- a/arch/x86/kernel/fpu/xsave.c +++ b/arch/x86/kernel/fpu/xsave.c @@ -565,8 +565,14 @@ void setup_xstate_comp(void) /* * setup the xstate image representing the init state */ -static void __init setup_init_fpu_buf(void) +static void setup_init_fpu_buf(void) { + static int on_boot_cpu = 1; + + if (!on_boot_cpu) + return; + on_boot_cpu = 0; + /* * Setup init_xstate_buf to represent the init state of * all the features managed by the xsave @@ -738,8 +744,7 @@ void __init_refok eager_fpu_init(void) return; } - if (!init_xstate_buf) - setup_init_fpu_buf(); + setup_init_fpu_buf(); } /* |
