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| author |   Andreas Larsson <andreas@gaisler.com> | 2014-11-05 15:52:08 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-11-07 12:51:44 -0800 |
| commit | 1a17fdc4f4ed06b63fac1937470378a5441a663a (patch) | |
| tree | 1590a724b9a40458ba1a990ceb41fc51839196fc /arch/sparc/include/uapi/asm/swab.h | |
| parent | sparc64: Do irq_{enter,exit}() around generic_smp_call_function*(). (diff) | |
| download | linux-dev-1a17fdc4f4ed06b63fac1937470378a5441a663a.tar.xz linux-dev-1a17fdc4f4ed06b63fac1937470378a5441a663a.zip | |
sparc32: Implement xchg and atomic_xchg using ATOMIC_HASH locks
Atomicity between xchg and cmpxchg cannot be guaranteed when xchg is
implemented with a swap and cmpxchg is implemented with locks.
Without this, e.g. mcs_spin_lock and mcs_spin_unlock are broken.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions