[PATCH tip v7 0/7] Simple wait queue support
From: Daniel Wagner
Date: Fri Jan 29 2016 - 09:05:01 EST
Hi,
As it turns out I missed a few incompatible-pointer-types errors.
Furthermore I even missed to update one calling side on wait in the ARM KVM
code base. Luckily the kbuild test robot found them all.
These patches are against
tip/sched/core 0905f04eb21fc1c2e690bed5d0418a061d56c225
also available as git tree:
git://git.kernel.org/pub/scm/linux/kernel/git/wagi/linux.git tip-swait
cheers,
daniel
changes since v6:
- fixed a couple of incompatible-pointer-types errors
- fixed a missing KVM ARM wait -> swait update
changes since v5:
- unconditionally add -Werror=incompatible-pointer-types
- updated KVM statistics in commit message
- rebased on tip/sched/core
- added ack-by PeterZ
changes since v4:
- replaced patch #2 which tried to force to compiler to
exit with an error by using compile time assertion type
check macros. Instead use -Werror=incompatible-pointer-types
to tell the compiler to barf loudly.
- fixed wrong API usage in patch 4 as reported by Boqun.
changes since v3
- rebased it on tip/sched/core (KVM bits have changed slightly)
- added compile time type check assertion
- added non lazy version of swake_up_locked()
changes since v2
- rebased again on tip/master. The patches apply
cleanly on v4.3-rc6 too.
- fixed up mips
- reordered patches to avoid lockdep warning when doing bissect.
- remove unnecessary initialization of rsp->rda in rcu_init_one().
changes since v1 (PATCH v0)
- rebased and fixed some typos found by cross building
for S390, ARM and powerpc. For some unknown reason didn't catch
them last time.
- dropped completion patches because it is not clear yet
how to handle complete_all() calls hard-irq/atomic contexts
and swake_up_all.
changes since v0 (RFC v0)
- promoted the series to PATCH state instead of RFC
- fixed a few fallouts with build all and some cross compilers
such ARM, PowerPC, S390.
- Added the simple waitqueue transformation for KVM from -rt
including some numbers requested by Paolo.
- Added a commit message to PeterZ's patch. Hope he likes it.
[I got the numbering wrong in v1, so instead 'PATCH v1' you find it
as 'PATCH v0' series]
v6: https://lkml.org/lkml/2016/1/28/462
v5: https://lkml.org/lkml/2015/11/30/318
v4: https://lwn.net/Articles/665655/
v3: https://lwn.net/Articles/661415/
v2: https://lwn.net/Articles/660628/
v1: https://lwn.net/Articles/656942/
v0: https://lwn.net/Articles/653586/
Daniel Wagner (4):
video: Use bool instead int pointer for get_opt_bool() argument
MIPS: Differentiate between 32 and 64 bit ELF header
kbuild: Add option to turn incompatible pointer check into error
rcu: Do not call rcu_nocb_gp_cleanup() while holding rnp->lock
Marcelo Tosatti (1):
KVM: use simple waitqueue for vcpu->wq
Paul Gortmaker (1):
rcu: use simple wait queues where possible in rcutree
Peter Zijlstra (Intel) (1):
wait.[ch]: Introduce the simple waitqueue (swait) implementation
Makefile | 3 +
arch/arm/kvm/arm.c | 8 +-
arch/arm/kvm/psci.c | 4 +-
arch/mips/include/asm/elf.h | 68 ++++++------
arch/mips/kvm/mips.c | 8 +-
arch/powerpc/include/asm/kvm_host.h | 4 +-
arch/powerpc/kvm/book3s_hv.c | 23 ++---
arch/s390/include/asm/kvm_host.h | 2 +-
arch/s390/kvm/interrupt.c | 4 +-
arch/x86/kvm/lapic.c | 6 +-
drivers/video/fbdev/intelfb/intelfbdrv.c | 2 +-
include/linux/kvm_host.h | 5 +-
include/linux/swait.h | 172 +++++++++++++++++++++++++++++++
kernel/rcu/tree.c | 24 +++--
kernel/rcu/tree.h | 12 ++-
kernel/rcu/tree_plugin.h | 32 ++++--
kernel/sched/Makefile | 2 +-
kernel/sched/swait.c | 123 ++++++++++++++++++++++
virt/kvm/async_pf.c | 4 +-
virt/kvm/kvm_main.c | 17 ++-
20 files changed, 420 insertions(+), 103 deletions(-)
create mode 100644 include/linux/swait.h
create mode 100644 kernel/sched/swait.c
--
2.5.0