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4 Commits

Author SHA1 Message Date
Paul Mundt 9bbafce2ee 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>
 2008-03-26 19:02:47 +09:00
Paul Mundt a23ba43573 sh: comment tidying for sh64->sh migration. 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
 2008-01-28 13:18:58 +09:00
Paul Mundt 332fd57b92 sh: Bring the SH-5 FPU in line with the SH-4 FPU API. 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
 2008-01-28 13:18:55 +09:00
Paul Mundt 600ee240d1 sh: Move over and enable FPU support for SH-5. 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
 2008-01-28 13:18:48 +09:00