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Subject[PATCH REBASED 0/6] rwsem: Implement down_read_killable()

this is resending of the series, I previously sent. There are no changes
in separate patches except of [4/6], which is rebased on recent tip.git.

Two patches from the previous sending are already applied by Peter,
so they are not in this series. They are:
83ced169d9a0 "locking/rwsem-xadd: Add killable versions of rwsem_down_read_failed()" and
0aa1125fa8bc "locking/rwsem-spinlock: Add killable versions of __down_read()"

Also, there is one patch more [6/6], which was sent separate in
the reply to the first series.

So, there is no changes (except [4/6]). Please, take a look.

The series introduces new down_read_killable() primitive, which
is similar to down_read(), but it may be interrupted by a signal.
The most touched is architectures code. Also, it marks a new user
of the primitive, which is iterate_dir().


Kirill Tkhai (6):
alpha: Add __down_read_killable()
ia64: Add __down_read_killable()
s390: Add __down_read_killable()
x86: Add __down_read_killable()
rwsem: Add down_read_killable()
fs: Use killable down_read() in iterate_dir()

arch/alpha/include/asm/rwsem.h | 18 ++++++++++++++++--
arch/ia64/include/asm/rwsem.h | 22 +++++++++++++++++++---
arch/s390/include/asm/rwsem.h | 18 ++++++++++++++++--
arch/x86/include/asm/rwsem.h | 35 +++++++++++++++++++++++++----------
arch/x86/lib/rwsem.S | 12 ++++++++++++
fs/readdir.c | 11 +++++------
include/asm-generic/rwsem.h | 8 ++++++++
include/linux/rwsem.h | 1 +
kernel/locking/rwsem.c | 16 ++++++++++++++++
9 files changed, 118 insertions(+), 23 deletions(-)

Signed-off-by: Kirill Tkhai <>

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