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 <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/kernel/fpu/xsave.c | 11 ++++++++--- 1 file 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(); } /* -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
