4 Commits

Author	SHA1	Message	Date
Paul Mundt	138bed154e	sh: Fix TIF_USEDFPU clearing under FPU emulation. ... The unlazy_fpu() path calls in to save_fpu() if the task has TIF_USEDFPU set. save_fpu() being the crap API that it is has the side effect of clearing the flag itself, which presently doesn't happen if we're using FPU emulation. Fix this up for now, pending an overhaul in 2.6.26. Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-03-26 19:09:21 +09:00
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	74d99a5e26	sh: SH-2A FPU support. ... Signed-off-by: Kieran Bingham <kbingham@mpc-data.co.uk> Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-01-28 13:18:57 +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