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
David Howells
922a70d327
aout: move STACK_TOP[_MAX] to asm/processor.h
...
Move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're
required whether or not A.OUT format is available.
Signed-off-by: David Howells <dhowells@redhat.com >
Cc: <linux-arch@vger.kernel.org >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org >
2008-02-08 09:22:29 -08:00
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
ffd25eb6cd
sh: Stubs for fpu disabled on SH-5.
...
Signed-off-by: Paul Mundt <lethal@linux-sh.org >
2008-01-28 13:18:51 +09:00
Paul Mundt
256b22ca66
sh: Have SH-5 provide an {en,dis}able_fpu() impl.
...
Signed-off-by: Paul Mundt <lethal@linux-sh.org >
2008-01-28 13:18:44 +09:00
Paul Mundt
76168c21b7
sh: More SH-5 cpuinfo tidying.
...
Signed-off-by: Paul Mundt <lethal@linux-sh.org >
2008-01-28 13:18:43 +09:00
Paul Mundt
c0acca6789
sh: SH-5 also uses the ASID cache.
...
Signed-off-by: Paul Mundt <lethal@linux-sh.org >
2008-01-28 13:18:42 +09:00
Paul Mundt
af3c7dfe82
sh: Split out processor.h in to _32 and _64 variants.
...
Signed-off-by: Paul Mundt <lethal@linux-sh.org >
2008-01-28 13:18:42 +09:00
