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| author | Paul Mundt | 2009-11-24 09:56:17 +0100 |
|---|---|---|
| committer | Paul Mundt | 2009-11-24 09:56:17 +0100 |
| commit | 0f09e197a39c081fa8c2752ee65919cb6cba963a (patch) | |
| tree | 4b3e8f930f317d775b814c65898d100ba1450241 /arch/sh/kernel/cpu/sh2a | |
| parent | sh: Minor optimisations to FPU handling (diff) | |
| download | kernel-qcow2-linux-0f09e197a39c081fa8c2752ee65919cb6cba963a.tar.gz kernel-qcow2-linux-0f09e197a39c081fa8c2752ee65919cb6cba963a.tar.xz kernel-qcow2-linux-0f09e197a39c081fa8c2752ee65919cb6cba963a.zip | |
sh: Apply the sleazy FPU changes for SH-2A FPU as well.
This plugs in the fpu_counter manipulation for the SH-2A side also.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh2a')
| -rw-r--r-- | arch/sh/kernel/cpu/sh2a/fpu.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/sh/kernel/cpu/sh2a/fpu.c b/arch/sh/kernel/cpu/sh2a/fpu.c index 13817ee49d52..d395ce5740e7 100644 --- a/arch/sh/kernel/cpu/sh2a/fpu.c +++ b/arch/sh/kernel/cpu/sh2a/fpu.c @@ -608,18 +608,18 @@ BUILD_TRAP_HANDLER(fpu_error) force_sig(SIGFPE, tsk); } -BUILD_TRAP_HANDLER(fpu_state_restore) +void fpu_state_restore(struct pt_regs *regs) { struct task_struct *tsk = current; - TRAP_HANDLER_DECL; grab_fpu(regs); - if (!user_mode(regs)) { + if (unlikely(!user_mode(regs))) { printk(KERN_ERR "BUG: FPU is used in kernel mode.\n"); + BUG(); return; } - if (used_math()) { + if (likely(used_math())) { /* Using the FPU again. */ restore_fpu(tsk); } else { @@ -628,4 +628,12 @@ BUILD_TRAP_HANDLER(fpu_state_restore) set_used_math(); } task_thread_info(tsk)->status |= TS_USEDFPU; + tsk->fpu_counter++; +} + +BUILD_TRAP_HANDLER(fpu_state_restore) +{ + TRAP_HANDLER_DECL; + + fpu_state_restore(regs); } |