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authorAl Viro <viro@ftp.linux.org.uk>2006-10-08 09:32:15 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-08 15:32:35 -0400
commit7a39f52202a70ff6834e37053e2ee55c7d351621 (patch)
treede2f029495110336d2dd2b89205db2c62710dd50 /include/asm-alpha/reg.h
parent6d24c8dc2e656b02807aa0506405727d34c0376c (diff)
[PATCH] sparc32 rwlock fix
read_trylock() is broken on sparc32 (doesn't build and didn't work right, actually). Proposed fix: - make "writer holds lock" distinguishable from "reader tries to grab lock" - have __raw_read_trylock() try to acquire the mutex (in LSB of lock), terminating spin if we see that there's writer holding it. Then do the rest as we do in read_lock(). Thanks to Ingo for discussion... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-alpha/reg.h')
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