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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-10-09 00:10:01 +0900
committerRalf Baechle <ralf@linux-mips.org>2006-10-09 23:20:48 +0100
commite04582b7bc70b40c57287cdc24f81964ee88f565 (patch)
treea5127c2d4165e656a84612836f6326427843acca /arch/mips/kernel/traps.c
parentf5c70dd7f384db4c524c35288d9be3ed61ac41a9 (diff)
[MIPS] Make sure cpu_has_fpu is used only in atomic context
Make sure cpu_has_fpu (which uses smp_processor_id()) is used only in atomic context. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/traps.c')
-rw-r--r--arch/mips/kernel/traps.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index b7292a56d4c..cce8313ec27 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -66,7 +66,7 @@ extern asmlinkage void handle_mcheck(void);
extern asmlinkage void handle_reserved(void);
extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
- struct mips_fpu_struct *ctx);
+ struct mips_fpu_struct *ctx, int has_fpu);
void (*board_be_init)(void);
int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
@@ -641,7 +641,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
preempt_enable();
/* Run the emulator */
- sig = fpu_emulator_cop1Handler (regs, &current->thread.fpu);
+ sig = fpu_emulator_cop1Handler (regs, &current->thread.fpu, 1);
preempt_disable();
@@ -791,11 +791,13 @@ asmlinkage void do_cpu(struct pt_regs *regs)
set_used_math();
}
- preempt_enable();
-
- if (!cpu_has_fpu) {
- int sig = fpu_emulator_cop1Handler(regs,
- &current->thread.fpu);
+ if (cpu_has_fpu) {
+ preempt_enable();
+ } else {
+ int sig;
+ preempt_enable();
+ sig = fpu_emulator_cop1Handler(regs,
+ &current->thread.fpu, 0);
if (sig)
force_sig(sig, current);
#ifdef CONFIG_MIPS_MT_FPAFF