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[LIB]: Consolidate _atomic_dec_and_lock()

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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
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8
arch/sparc64/Kconfig.debug
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@@ -33,14 +33,6 @@ config DEBUG_BOOTMEM
depends on DEBUG_KERNEL
bool "Debug BOOTMEM initialization"
# We have a custom atomic_dec_and_lock() implementation but it's not
# compatible with spinlock debugging so we need to fall back on
# the generic version in that case.
config HAVE_DEC_LOCK
bool
depends on SMP && !DEBUG_SPINLOCK
default y
config MCOUNT
bool
depends on STACK_DEBUG