Copied to assorted architecture maintainers and mailing lists, please trim cc: list back to lkml plus arch if you reply. The generic version of read_trylock() never tests if the lock is in use, it always spins waiting for the lock to be free. IOW, it behaves like read_lock(). Given the different implementations of rwlock_t, it is hard for generic__raw_read_trylock() to do anything else. I strongly recommend that the architectures below define their own version of __raw_read_trylock() that really test the lock first, then we can ditch generic__raw_read_trylock(). I have already sent an ia64 patch to that mailing list. include/asm-arm/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) include/asm-ia64/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) include/asm-m32r/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) include/asm-mips/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) include/asm-parisc/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) include/asm-sh/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) include/asm-sparc64/spinlock.h:#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
