| commit | 8aaf1dda42576b0f8dffb004065baa806f4df9b6 | [log] [tgz] |
|---|---|---|
| author | Chris Metcalf <cmetcalf@tilera.com> | Mon May 16 13:59:39 2011 -0400 |
| committer | Chris Metcalf <cmetcalf@tilera.com> | Thu May 19 22:55:49 2011 -0400 |
| tree | e9376caaf70b54e4b236840a1cc77a443c07b341 | |
| parent | 4800a5bb13c09a572f7c74662a77c9eca229eba1 [diff] |
arch/tile: use better definitions of xchg() and cmpxchg()
These definitions use a ({}) construct to avoid some cases where
we were getting warnings about unused return values. We also
promote the definition to the common <asm/atomic.h>, since it applies
to both the 32- and 64-bit atomics.
In addition, define __HAVE_ARCH_CMPXCHG for TILE-Gx since it has
efficient direct atomic instructions.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>