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| author | David S. Miller <davem@davemloft.net> | 2010-08-19 07:53:26 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-08-19 07:53:26 +0200 |
| commit | 0f58189d4a3ca96d7959501ecb203177efdbc5bd (patch) | |
| tree | b5ad2f63da4c1caa5d20487cf370d51e4392111c /kernel/dma.c | |
| parent | sparc64: simple microoptimizations for atomic functions (diff) | |
| download | linux-0f58189d4a3ca96d7959501ecb203177efdbc5bd.tar.xz linux-0f58189d4a3ca96d7959501ecb203177efdbc5bd.zip | |
sparc64: Make lock backoff really a NOP on UP builds.
As noticed by Mikulas Patocka, the backoff macros don't
completely nop out for UP builds, we still get a
branch always and a delay slot nop.
Fix this by making the branch to the backoff spin loop
selective, then we can nop out the spin loop completely.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/dma.c')
0 files changed, 0 insertions, 0 deletions