linux.git/include/asm-sh/fpu.h, branch master Linux kernel source tree sh: migrate to arch/sh/include/ 2008-07-28T23:09:44+00:00 Paul Mundt lethal@linux-sh.org 2008-07-28T23:09:44+00:00 f15cbe6f1a4b4d9df59142fc8e4abb973302cf44 This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac. Most of the moving about was done with Sam's directions at: http://marc.info/?l=linux-sh&m=121724823706062&w=2 with subsequent hacking and fixups entirely my fault. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac.

Most of the moving about was done with Sam's directions at:

http://marc.info/?l=linux-sh&m=121724823706062&w=2

with subsequent hacking and fixups entirely my fault.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Fix TIF_USEDFPU clearing under FPU emulation. 2008-03-26T10:09:21+00:00 Paul Mundt lethal@linux-sh.org 2008-03-26T10:09:21+00:00 138bed154eab2205b4ef93f02f5feb1edf6d8552 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> 
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>
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: SH-2A FPU support. 2008-01-28T04:18:57+00:00 Paul Mundt lethal@linux-sh.org 2007-11-26T11:38:36+00:00 74d99a5e262229ee865f6f68528d10b82471ead6 Signed-off-by: Kieran Bingham <kbingham@mpc-data.co.uk> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Kieran Bingham <kbingham@mpc-data.co.uk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Bring the SH-5 FPU in line with the SH-4 FPU API. 2008-01-28T04:18:55+00:00 Paul Mundt lethal@linux-sh.org 2007-11-22T08:30:50+00:00 332fd57b92d26e2ac6112340b98e92bb76117a41 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>