linux.git/arch/sh/kernel/process_32.c, branch v2.6.25 Linux kernel source tree sh: Fix occasional FPU register corruption under preempt. 2008-03-26T10:02:47+00:00 Paul Mundt lethal@linux-sh.org 2008-03-26T10:02:47+00:00 9bbafce2eec190ef7e44b0eb1095ba17ce6ad3af 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> 
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>
sh: GUSA atomic rollback support. 2008-01-28T04:18:58+00:00 Stuart Menefy stuart.menefy@st.com 2007-11-30T07:12:36+00:00 1efe4ce3ca126da77e450d5a83f7201949d76f62 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> 
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>
sh: Share bug/debug traps across _32 and _64. 2008-01-28T04:18:50+00:00 Paul Mundt lethal@linux-sh.org 2007-11-20T09:08:06+00:00 5a4f7c66be981c6b5f44a4d66a14ea6ac9b7b6b0 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Share the ELF dump_task interfaces. 2008-01-28T04:18:49+00:00 Paul Mundt lethal@linux-sh.org 2007-11-20T06:48:39+00:00 e7e0a4b54a7f225f770d313f9e042f83ece57a35 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Split out arch/sh/kernel/process.c for _32 and _64 variants. 2008-01-28T04:18:42+00:00 Paul Mundt lethal@linux-sh.org 2007-11-09T07:57:04+00:00 fe51bc9eaf45253bd437907ed04031a93640ca69 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>