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| author | Paul Mundt | 2008-03-26 11:02:47 +0100 |
|---|---|---|
| committer | Paul Mundt | 2008-03-26 11:02:47 +0100 |
| commit | 9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af (patch) | |
| tree | 8deae79efc43d39763bdba8ca9b670e6a1782859 /include/asm-sh/processor_32.h | |
| parent | Linux 2.6.25-rc7 (diff) | |
| download | kernel-qcow2-linux-9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af.tar.gz kernel-qcow2-linux-9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af.tar.xz kernel-qcow2-linux-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 'include/asm-sh/processor_32.h')
| -rw-r--r-- | include/asm-sh/processor_32.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-sh/processor_32.h b/include/asm-sh/processor_32.h index df2d5b039ef4..c09305d6a9d9 100644 --- a/include/asm-sh/processor_32.h +++ b/include/asm-sh/processor_32.h @@ -70,6 +70,7 @@ extern struct sh_cpuinfo cpu_data[]; */ #define SR_DSP 0x00001000 #define SR_IMASK 0x000000f0 +#define SR_FD 0x00008000 /* * FPU structure and data |