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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-23 10:59:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-23 10:59:07 -0700
commitec0d7f18ab7b5097d7c0c8f3d909ca1031b9d5cd (patch)
tree7d62c924592145f819ecaa5d60460a05a10dfdbd /arch/mn10300
parent269af9a1a08d368b46d72e74126564d04c354f7e (diff)
parent1dcc8d7ba235a316a056f993e88f0d18b92c60d9 (diff)
downloadop-kernel-dev-ec0d7f18ab7b5097d7c0c8f3d909ca1031b9d5cd.zip
op-kernel-dev-ec0d7f18ab7b5097d7c0c8f3d909ca1031b9d5cd.tar.gz
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull fpu state cleanups from Ingo Molnar: "This tree streamlines further aspects of FPU handling by eliminating the prepare_to_copy() complication and moving that logic to arch_dup_task_struct(). It also fixes the FPU dumps in threaded core dumps, removes and old (and now invalid) assumption plus micro-optimizes the exit path by avoiding an FPU save for dead tasks." Fixed up trivial add-add conflict in arch/sh/kernel/process.c that came in because we now do the FPU handling in arch_dup_task_struct() rather than the legacy (and now gone) prepare_to_copy(). * 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, fpu: drop the fpu state during thread exit x86, xsave: remove thread_has_fpu() bug check in __sanitize_i387_state() coredump: ensure the fpu state is flushed for proper multi-threaded core dump fork: move the real prepare_to_copy() users to arch_dup_task_struct()
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/include/asm/processor.h3
-rw-r--r--arch/mn10300/kernel/process.c10
2 files changed, 6 insertions, 7 deletions
diff --git a/arch/mn10300/include/asm/processor.h b/arch/mn10300/include/asm/processor.h
index f7b3c9a..247928c 100644
--- a/arch/mn10300/include/asm/processor.h
+++ b/arch/mn10300/include/asm/processor.h
@@ -139,9 +139,6 @@ static inline void start_thread(struct pt_regs *regs,
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
-/* Prepare to copy thread state - unlazy all lazy status */
-extern void prepare_to_copy(struct task_struct *tsk);
-
/*
* create a kernel thread without removing it from tasklists
*/
diff --git a/arch/mn10300/kernel/process.c b/arch/mn10300/kernel/process.c
index 14707f2..7dab0cd 100644
--- a/arch/mn10300/kernel/process.c
+++ b/arch/mn10300/kernel/process.c
@@ -208,12 +208,14 @@ void copy_segments(struct task_struct *p, struct mm_struct *new_mm)
}
/*
- * this gets called before we allocate a new thread and copy the current task
- * into it so that we can store lazy state into memory
+ * this gets called so that we can store lazy state into memory and copy the
+ * current task into the new thread.
*/
-void prepare_to_copy(struct task_struct *tsk)
+int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
- unlazy_fpu(tsk);
+ unlazy_fpu(src);
+ *dst = *src;
+ return 0;
}
/*
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