| commit | b9338a78fc21e980d33c58b31f3bb37cd48a68f6 | |
| author | Tzachi Perelstein <tzachi@marvell.com> | |
| Sun, 9 Sep 2007 13:24:59 +0000 (9 14:24 +0100) | ||
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | |
| Thu, 13 Sep 2007 14:10:27 +0000 (13 15:10 +0100) | ||
| tree | a70c8ce2b23ddc383f3908e71b1dfa1141363b88 | treesnapshot (tar.gz zip) |
| parent | a53d6fb83efc75bbd7876459e6e1291c4925103d | commitdiff |
[ARM] 4567/1: Fix 'Oops - undefined instruction' when CONFIG_VFP=y on non VFP device
vfp_init() takes care of the condition when CONFIG_VFP=y but no real VFP
device exists. However, when this condition is true, a compiler might
misplace code lines in a way that will break this support. (To be more
specific - fmrx(FPSID) might be executed before vfp_testing_entry
assignment, which will end up with Oops - undefined instruction).
This patch adds a barrier() to guarantee the right execution ordering.
Signed-off-by: Assaf Hoffman
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
vfp_init() takes care of the condition when CONFIG_VFP=y but no real VFP
device exists. However, when this condition is true, a compiler might
misplace code lines in a way that will break this support. (To be more
specific - fmrx(FPSID) might be executed before vfp_testing_entry
assignment, which will end up with Oops - undefined instruction).
This patch adds a barrier() to guarantee the right execution ordering.
Signed-off-by: Assaf Hoffman
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| arch/arm/vfp/vfpmodule.c | diffblobblamehistory |