lib · ca9bda00b4aafc42cd3d1b9d32934463e2993b4c · KED Software Projects / Miscellaneous / KED Linux Kernel Fork

[PATCH] spinlock_debug: don't recompute (jiffies_per_loop * HZ) in spinloop

Chuck Ebbert authored 18 years ago

In spinlock_debug.c, the spinloops call __delay() on every iteration.
Because that is an external function, (jiffies_per_loop * HZ), the loop's
iteration limit, gets recomputed every time.  Caching it explicitly
prevents that.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

c22f008b

History

c22f008b 18 years ago

History

Name	Last commit	Last update
..
reed_solomon
zlib_deflate
zlib_inflate
.gitignore
Kconfig
Kconfig.debug
Makefile
audit.c
bitmap.c
bust_spinlocks.c
cmdline.c
cpumask.c
crc-ccitt.c
crc16.c
crc32.c
crc32defs.h
ctype.c
debug_locks.c
dec_and_lock.c
div64.c
dump_stack.c
errno.c
extable.c
find_next_bit.c
gen_crc32table.c
genalloc.c
halfmd4.c
hweight.c
idr.c
inflate.c
int_sqrt.c
iomap.c
iomap_copy.c
kernel_lock.c
klist.c
kobject.c
kobject_uevent.c
kref.c
libcrc32c.c
list_debug.c
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c
parser.c
percpu_counter.c
plist.c
prio_tree.c
radix-tree.c
rbtree.c
rwsem-spinlock.c
rwsem.c
semaphore-sleepers.c
sha1.c
smp_processor_id.c
sort.c
spinlock_debug.c
string.c
swiotlb.c
textsearch.c
ts_bm.c
ts_fsm.c
ts_kmp.c
vsprintf.c