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authorPaul Mundt <lethal@linux-sh.org>2008-03-26 06:02:47 -0400
committerPaul Mundt <lethal@linux-sh.org>2008-03-26 06:02:47 -0400
commit9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af (patch)
tree8deae79efc43d39763bdba8ca9b670e6a1782859 /include/asm-sh/processor_32.h
parent05dda977f2574c3341abef9b74c27d2b362e1e3a (diff)
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.h1
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[];
70 */ 70 */
71#define SR_DSP 0x00001000 71#define SR_DSP 0x00001000
72#define SR_IMASK 0x000000f0 72#define SR_IMASK 0x000000f0
73#define SR_FD 0x00008000
73 74
74/* 75/*
75 * FPU structure and data 76 * FPU structure and data