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author | Paul Mundt <lethal@linux-sh.org> | 2008-03-26 19:02:47 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-03-26 19:02:47 +0900 |
commit | 9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af (patch) | |
tree | 8deae79efc43d39763bdba8ca9b670e6a1782859 /include/asm-sh/processor_32.h | |
parent | 05dda977f2574c3341abef9b74c27d2b362e1e3a (diff) | |
download | op-kernel-dev-9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af.zip op-kernel-dev-9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af.tar.gz |
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 df2d5b0..c09305d 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 |