The first patch contains an optimization for acquiring the rwsem write lock
in the slowpath.
This rest of the series converts the rwsem count variable to an atomic_long_t
since it is used it as an atomic variable. This allows us to also remove
the rwsem_atomic_{add,update} abstraction and reduce 100+ lines of code.
arch/alpha/include/asm/rwsem.h | 42 --------------------------------
arch/ia64/include/asm/rwsem.h | 7 ------
arch/s390/include/asm/rwsem.h | 37 -----------------------------
arch/x86/include/asm/rwsem.h | 18 --------------
include/asm-generic/rwsem.h | 16 -------------
include/linux/rwsem.h | 6 ++---
kernel/locking/rwsem-xadd.c | 54 ++++++++++++++++++++++++++----------------
7 files changed, 36 insertions(+), 144 deletions(-)
--
2.1.4
