| commit | 0f58189d4a3ca96d7959501ecb203177efdbc5bd | |
| author | David S. Miller <davem@davemloft.net> | |
| Thu, 19 Aug 2010 05:53:26 +0000 (18 22:53 -0700) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Thu, 19 Aug 2010 05:53:26 +0000 (18 22:53 -0700) | ||
| tree | b5ad2f63da4c1caa5d20487cf370d51e4392111c | treesnapshot (tar.gz zip) |
| parent | 6ec274750c99448c3412bbc10c97ce0c993f8a4e | commitdiff |
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>
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>
| arch/sparc/include/asm/backoff.h | diffblobblamehistory | |
| arch/sparc/lib/atomic_64.S | diffblobblamehistory | |
| arch/sparc/lib/bitops.S | diffblobblamehistory |