3 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
Stuart Menefy	1efe4ce3ca	sh: GUSA atomic rollback support. ... This implements kernel-level atomic rollback built on top of gUSA, as an alternative non-IRQ based atomicity method. This is generally a faster method for platforms that are lacking the LL/SC pairs that SH-4A and later use, and is only supportable on legacy cores. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-01-28 13:18:58 +09:00
Paul Mundt	f7a7b15344	sh: Move in the SH-5 signal trampoline impl. ... Signed-off-by: Paul Mundt <lethal@linux-sh.org>	2008-01-28 13:18:43 +09:00