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authorLinus Torvalds <torvalds@linux-foundation.org>2012-02-20 19:34:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-02-20 19:34:10 -0800
commit27e74da9800289e69ba907777df1e2085231eff7 (patch)
tree3b01385191da0722f747529908a902b169fae805 /arch/x86
parent8ebbfb49574818f07a25bc119b1bbdf1c2853a39 (diff)
downloadblackbird-op-linux-27e74da9800289e69ba907777df1e2085231eff7.tar.gz
blackbird-op-linux-27e74da9800289e69ba907777df1e2085231eff7.zip
i387: export 'fpu_owner_task' per-cpu variable
(And define it properly for x86-32, which had its 'current_task' declaration in separate from x86-64) Bitten by my dislike for modules on the machines I use, and the fact that apparently nobody else actually wanted to test the patches I sent out. Snif. Nobody else cares. Anyway, we probably should uninline the 'kernel_fpu_begin()' function that is what modules actually use and that references this, but this is the minimal fix for now. Reported-by: Josh Boyer <jwboyer@gmail.com> Reported-and-tested-by: Jongman Heo <jongman.heo@samsung.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/cpu/common.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index b667148dfad7..c0f7d68d318f 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1045,6 +1045,7 @@ DEFINE_PER_CPU(char *, irq_stack_ptr) =
DEFINE_PER_CPU(unsigned int, irq_count) = -1;
DEFINE_PER_CPU(struct task_struct *, fpu_owner_task);
+EXPORT_PER_CPU_SYMBOL(fpu_owner_task);
/*
* Special IST stacks which the CPU switches to when it calls
@@ -1113,6 +1114,8 @@ void debug_stack_reset(void)
DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
+DEFINE_PER_CPU(struct task_struct *, fpu_owner_task);
+EXPORT_PER_CPU_SYMBOL(fpu_owner_task);
#ifdef CONFIG_CC_STACKPROTECTOR
DEFINE_PER_CPU_ALIGNED(struct stack_canary, stack_canary);
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