This patch (made against linux-2.4.4-pre6) makes a number of changes to the
rwsem implementation:
(1) Fixes a subtle contention bug between up_write and the down_* functions.
(2) Optimises the i386 fastpath implementation and changed the slowpath
implementation to aid it.
- The arch/i386/lib/rwsem.c is now gone.
- Better inline asm constraints have been applied.
(3) Changed the sparc64 fastpath implementation to use revised slowpath
interface.
[Dave Miller: can you check this please]
(4) Makes the generic spinlock implementation non-inline.
- lib/rwsem.c has been duplicated to lib/rwsem-spinlock.c and a
slightly different algorithm has been created. This one is simpler
since it does not have to use atomic operations on the counters as
all accesses to them are governed by a blanket spinlock.
David
This archive was generated by hypermail 2b29 : Sat Apr 21 2001 - 20:33:05 EDT