diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-23 10:59:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-23 10:59:07 -0700 |
| commit | ec0d7f18ab7b5097d7c0c8f3d909ca1031b9d5cd (patch) | |
| tree | 7d62c924592145f819ecaa5d60460a05a10dfdbd /arch/xtensa | |
| parent | 269af9a1a08d368b46d72e74126564d04c354f7e (diff) | |
| parent | 1dcc8d7ba235a316a056f993e88f0d18b92c60d9 (diff) | |
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/xtensa')
| -rw-r--r-- | arch/xtensa/include/asm/processor.h | 3 | ||||
| -rw-r--r-- | arch/xtensa/kernel/process.c | 9 |
2 files changed, 6 insertions, 6 deletions
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 3acb26e8dea..5c371d8d452 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -168,9 +168,6 @@ struct mm_struct; /* Free all resources held by a thread. */ #define release_thread(thread) do { } while(0) -/* Prepare to copy thread state - unlazy all lazy status */ -extern void prepare_to_copy(struct task_struct*); - /* Create a kernel thread without removing it from tasklists */ extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index 6a2d6edf8f7..9b306e550e3 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -140,13 +140,16 @@ void flush_thread(void) } /* - * This is called before the thread is copied. + * this gets called so that we can store coprocessor 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) { #if XTENSA_HAVE_COPROCESSORS - coprocessor_flush_all(task_thread_info(tsk)); + coprocessor_flush_all(task_thread_info(src)); #endif + *dst = *src; + return 0; } /* |