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linux-stable/arch/powerpc/lib
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Nicholas Piggin f61ab43cc1 powerpc/qspinlock: allow lock stealing in trylock and lock fastpath 
This change allows trylock to steal the lock. It also allows the initial
lock attempt to steal the lock rather than bailing out and going to the
slow path.

This gives trylock more strength: without this a continually-contended
lock will never permit a trylock to succeed. With this change, the
trylock has a small but non-zero chance.

It also gives the lock fastpath most of the benefit of passing the
reservation back through to the steal loop in the slow path without the
complexity.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221126095932.1234527-13-npiggin@gmail.com
2022-12-02 17:48:50 +11:00
..
alloc.c
checksum_32.S powerpc/32: Remove remaining .stabs annotations 2022-02-07 21:03:10 +11:00
checksum_64.S ppc: propagate the calling conventions change down to csum_partial_copy_generic() 2020-08-20 15:45:22 -04:00
checksum_wrappers.c net: unexport csum_and_copy_{from,to}_user 2022-04-29 14:37:59 -07:00
code-patching.c powerpc/code-patching: Speed up page mapping/unmapping 2022-09-01 13:56:01 +10:00
copy_32.S powerpc/32: Remove remaining .stabs annotations 2022-02-07 21:03:10 +11:00
copy_mc_64.S x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}() 2020-10-06 11:18:04 +02:00
copypage_64.S powerpc/64: asm use consistent global variable declaration and access 2022-09-28 19:22:12 +10:00
copypage_power7.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
copyuser_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
copyuser_power7.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
crtsavres.S
div64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
error-inject.c powerpc/64s: avoid reloading (H)SRR registers if they are still valid 2021-06-25 00:06:55 +10:00
feature-fixups-test.S powerpc: Test prefixed instructions in feature fixups 2020-05-19 00:11:02 +10:00
feature-fixups.c powerpc: Remove CONFIG_PPC_FSL_BOOK3E 2022-09-26 23:00:13 +10:00
hweight_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ldstfp.S powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
locks.c powerpc/pseries: Move some PAPR paravirt functions to their own file 2020-07-26 23:34:26 +10:00
Makefile powerpc/qspinlock: powerpc qspinlock implementation 2022-12-02 17:48:02 +11:00
mem_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
memcmp_32.S
memcmp_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
memcpy_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
memcpy_power7.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pmem.c powerpc/pmem: Include pmem prototypes 2021-01-30 11:39:28 +11:00
qspinlock.c powerpc/qspinlock: allow lock stealing in trylock and lock fastpath 2022-12-02 17:48:50 +11:00
quad.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
restart_table.c powerpc/64s: add a table of implicit soft-masked addresses 2021-06-30 22:21:20 +10:00
rheap.c
sstep.c powerpc/64: remove system call instruction emulation 2022-05-06 00:00:20 +10:00
string.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
string_32.S powerpc: Fix __clear_user() with KUAP enabled 2019-12-16 23:19:44 +11:00
string_64.S powerpc/64: asm use consistent global variable declaration and access 2022-09-28 19:22:12 +10:00
strlen_32.S
test-code-patching.c powerpc/code-patching: Replace patch_instruction() by ppc_inst_write() in selftests 2021-12-23 22:36:58 +11:00
test_emulate_step.c powerpc/ppc-opcode: Define and use PPC_RAW_SETB() 2022-07-27 21:36:05 +10:00
test_emulate_step_exec_instr.S powerpc: flexible GPR range save/restore macros 2021-11-29 23:15:20 +11:00
vmx-helper.c powerpc: Move C prototypes out of asm-prototypes.h 2022-03-08 22:06:25 +11:00
xor_vmx.c lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00
xor_vmx.h lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00
xor_vmx_glue.c lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00