[LIB]: Consolidate _atomic_dec_and_lock()

Several implementations were essentialy a common piece of C code using
the cmpxchg() macro.  Put the implementation in one spot that everyone
can share, and convert sparc64 over to using this.

Alpha is the lone arch-specific implementation, which codes up a
special fast path for the common case in order to avoid GP reloading
which a pure C version would require.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2005-09-14 21:47:01 -07:00
parent 4a805e863d
commit 4db2ce0199
26 changed files with 38 additions and 396 deletions
-5
View File
@@ -220,11 +220,6 @@ config PREEMPT
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.
config HAVE_DEC_LOCK
bool
depends on (SMP || PREEMPT)
default n
config SMP
bool "Symmetric multi-processing support"
---help---