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| author |   Paul Mundt <lethal@linux-sh.org> | 2008-03-26 19:02:47 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-03-26 19:02:47 +0900 |
| commit | 9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af (patch) | |
| tree | 8deae79efc43d39763bdba8ca9b670e6a1782859 /arch/sh/kernel/signal_32.c | |
| parent | Linux 2.6.25-rc7 (diff) | |
| download | linux-dev-9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af.tar.xz linux-dev-9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af.zip | |
sh: Fix occasional FPU register corruption under preempt.
Presently with preempt enabled there's the possibility to be preempted
after the TIF_USEDFPU test and the register save, leading to bogus
state post-__switch_to(). Use an explicit preempt_disable()/enable()
pair around unlazy_fpu()/clear_fpu() to avoid this. Follows the x86
change.
Reported-by: Takuo Koguchi <takuo.koguchi.sw@hitachi.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to '')
| -rw-r--r-- | arch/sh/kernel/signal_32.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index f6b5fbfe75c4..f311551d9a05 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -29,6 +29,7 @@ #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/cacheflush.h> +#include <asm/fpu.h> #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) |