]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: d768fce) | patch
[POWERPC] Add "memory" clobber to MMIO accessors
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 28 May 2008 00:18:17 +0000 (10:18 +1000)
committerPaul Mackerras <paulus@samba.org>
Sat, 31 May 2008 07:08:28 +0000 (17:08 +1000)
commitd7c4af633b57143d2fa246cb4521dc0354632a17
treedbc3ed8bf7173b102bf844ed8121941b0b2303d8tree | snapshot
parentd768fce20c691c064a5ed42e729d006c7c6ce8f1commit | diff
[POWERPC] Add "memory" clobber to MMIO accessors

Gcc might re-order MMIO accessors vs. surrounding consistent
memory accesses, which is a "bad thing", and could break drivers.
This fixes it by adding a "memory" clobber to the MMIO accessors,
which should prevent gcc from doing that reordering.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
include/asm-powerpc/io.h diff | blob | history
Linux Kernel Source Tree.