kernel.git/arch/parisc/include/asm/system.h, branch linux-2.6.30.yHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-2.6.30.y2009-07-30T21:40:07Zparisc: fix ldcw inline assembler2009-07-30T21:40:07ZHelge Deller2009-04-30T21:39:45Zurn:sha1:b556f93a508bfda0a25c8beb06f400ce813df59d
commit 7d17e2763129ea307702fcdc91f6e9d114b65c2d upstream.
There are two reasons to expose the memory *a in the asm:
1) To prevent the compiler from discarding a preceeding write to *a, and
2) to prevent it from caching *a in a register over the asm.
The change has had a few days testing with a SMP build of 2.6.22.19
running on a rp3440.
This patch is about the correctness of the __ldcw() macro itself.
The use of the macro should be confined to small inline functions
to try to limit the effect of clobbering memory on GCC's optimization
of loads and stores.
Signed-off-by: Dave Anglin <dave.anglin@nrc-cnrc.gc.ca>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
parisc: move include/asm-parisc to arch/parisc/include/asm2008-10-10T16:32:29ZKyle McMartin2008-07-29T03:02:13Zurn:sha1:deae26bf6a10e47983606f5df080b91e97650ead