R0dn3yS/android_kernel_xiaomi_sm7250
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
lineage-20.0
android_kernel_xiaomi_sm7250/arch/nds32
History
Waiman Long 72ed1d5634 BACKPORT: locking/rwsem: Remove rwsem-spinlock.c & use rwsem-xadd.c for all archs 
Currently, we have two different implementation of rwsem:

 1) CONFIG_RWSEM_GENERIC_SPINLOCK (rwsem-spinlock.c)
 2) CONFIG_RWSEM_XCHGADD_ALGORITHM (rwsem-xadd.c)

As we are going to use a single generic implementation for rwsem-xadd.c
and no architecture-specific code will be needed, there is no point
in keeping two different implementations of rwsem. In most cases, the
performance of rwsem-spinlock.c will be worse. It also doesn't get all
the performance tuning and optimizations that had been implemented in
rwsem-xadd.c over the years.

For simplication, we are going to remove rwsem-spinlock.c and make all
architectures use a single implementation of rwsem - rwsem-xadd.c.

All references to RWSEM_GENERIC_SPINLOCK and RWSEM_XCHGADD_ALGORITHM
in the code are removed.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Link: https://lkml.kernel.org/r/20190322143008.21313-3-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Change-Id: I8a94de8b29db44da529ccbb90dc591efa06906c7
Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>
2022-11-12 11:23:32 +00:00
..
boot nds32: Build infrastructure 2018-02-22 10:44:35 +08:00
configs fscrypt: remove filesystem specific build config option 2019-04-04 09:52:02 -07:00
include BACKPORT: ia64/tlb: Eradicate tlb_migrate_finish() callback 2022-11-12 11:23:07 +00:00
kernel UPSTREAM: nds32: Fix vDSO clock_getres() 2020-04-27 22:51:55 -07:00
lib nds32: Fix the symbols undefined issue by exporting them. 2018-05-23 13:26:20 +08:00
mm nds32: fix up stack guard gap 2021-07-28 11:13:51 +02:00
Kconfig BACKPORT: locking/rwsem: Remove rwsem-spinlock.c & use rwsem-xadd.c for all archs 2022-11-12 11:23:32 +00:00
Kconfig.cpu nds32: Fix the allmodconfig build. To make sure CONFIG_CPU_LITTLE_ENDIAN is default y 2018-05-23 13:26:21 +08:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile mass revert: clean 2022-11-12 11:18:57 +00:00