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| author |   David S. Miller <davem@davemloft.net> | 2005-09-08 14:37:53 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-09-08 14:37:53 -0700 |
| commit | 4d803fcdcd97dd346d4b39c3b76e5879cead8a31 (patch) | |
| tree | f30c8caa998261fc0983121021184f0f6cc555b4 /arch/sparc64/lib/clear_page.S | |
| parent | Merge branch 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev (diff) | |
| download | linux-dev-4d803fcdcd97dd346d4b39c3b76e5879cead8a31.tar.xz linux-dev-4d803fcdcd97dd346d4b39c3b76e5879cead8a31.zip | |
[SPARC64]: Inline membar()'s again.
Since GCC has to emit a call and a delay slot to the
out-of-line "membar" routines in arch/sparc64/lib/mb.S
it is much better to just do the necessary predicted
branch inline instead as:
ba,pt %xcc, 1f
membar #whatever
1:
instead of the current:
call membar_foo
dslot
because this way GCC is not required to allocate a stack
frame if the function can be a leaf function.
This also makes this bug fix easier to backport to 2.4.x
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/lib/clear_page.S')
0 files changed, 0 insertions, 0 deletions