diff options
| author | Anton Altaparmakov <aia21@cantab.net> | 2005-12-05 15:48:41 +0000 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2005-12-05 15:48:41 +0000 |
| commit | 292d4ed32e35df4755052b5002e533348d1648fd (patch) | |
| tree | 8522e6bab962696bd25a6c02fb068c674a09b7ee /arch/powerpc/kernel/process.c | |
| parent | 3c6af7fa787f21f8873a050568ed892312899eb5 (diff) | |
| parent | e4f5c82a92c2a546a16af1614114eec19120e40a (diff) | |
Merge branch 'master' of /usr/src/ntfs-2.6/
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 62 |
1 files changed, 25 insertions, 37 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index a5a7542a8ff3..105d5609ff57 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -201,6 +201,28 @@ int dump_spe(struct pt_regs *regs, elf_vrregset_t *evrregs) } #endif /* CONFIG_SPE */ +/* + * If we are doing lazy switching of CPU state (FP, altivec or SPE), + * and the current task has some state, discard it. + */ +static inline void discard_lazy_cpu_state(void) +{ +#ifndef CONFIG_SMP + preempt_disable(); + if (last_task_used_math == current) + last_task_used_math = NULL; +#ifdef CONFIG_ALTIVEC + if (last_task_used_altivec == current) + last_task_used_altivec = NULL; +#endif /* CONFIG_ALTIVEC */ +#ifdef CONFIG_SPE + if (last_task_used_spe == current) + last_task_used_spe = NULL; +#endif + preempt_enable(); +#endif /* CONFIG_SMP */ +} + int set_dabr(unsigned long dabr) { if (ppc_md.set_dabr) @@ -434,19 +456,7 @@ void show_regs(struct pt_regs * regs) void exit_thread(void) { kprobe_flush_task(current); - -#ifndef CONFIG_SMP - if (last_task_used_math == current) - last_task_used_math = NULL; -#ifdef CONFIG_ALTIVEC - if (last_task_used_altivec == current) - last_task_used_altivec = NULL; -#endif /* CONFIG_ALTIVEC */ -#ifdef CONFIG_SPE - if (last_task_used_spe == current) - last_task_used_spe = NULL; -#endif -#endif /* CONFIG_SMP */ + discard_lazy_cpu_state(); } void flush_thread(void) @@ -458,18 +468,7 @@ void flush_thread(void) t->flags ^= (_TIF_ABI_PENDING | _TIF_32BIT); #endif -#ifndef CONFIG_SMP - if (last_task_used_math == current) - last_task_used_math = NULL; -#ifdef CONFIG_ALTIVEC - if (last_task_used_altivec == current) - last_task_used_altivec = NULL; -#endif /* CONFIG_ALTIVEC */ -#ifdef CONFIG_SPE - if (last_task_used_spe == current) - last_task_used_spe = NULL; -#endif -#endif /* CONFIG_SMP */ + discard_lazy_cpu_state(); #ifdef CONFIG_PPC64 /* for now */ if (current->thread.dabr) { @@ -635,18 +634,7 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) } #endif -#ifndef CONFIG_SMP - if (last_task_used_math == current) - last_task_used_math = NULL; -#ifdef CONFIG_ALTIVEC - if (last_task_used_altivec == current) - last_task_used_altivec = NULL; -#endif -#ifdef CONFIG_SPE - if (last_task_used_spe == current) - last_task_used_spe = NULL; -#endif -#endif /* CONFIG_SMP */ + discard_lazy_cpu_state(); memset(current->thread.fpr, 0, sizeof(current->thread.fpr)); current->thread.fpscr.val = 0; #ifdef CONFIG_ALTIVEC |