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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-11-28 13:11:13 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-12-02 17:48:02 +1100 |
| commit | 9f61521c7a284e799050cd2adacc9a611bd2b491 (patch) | |
| tree | ea553dc89ef9d27ee506c2f76b413869fc352d31 /arch/powerpc/Kconfig | |
| parent | 247f34f7b80357943234f93f247a1ae6b6c3a740 (diff) | |
| download | linux-9f61521c7a284e799050cd2adacc9a611bd2b491.tar.gz | |
powerpc/qspinlock: powerpc qspinlock implementation
Add a powerpc specific implementation of queued spinlocks. This is the
build framework with a very simple (non-queued) spinlock implementation
to begin with. Later changes add queueing, and other features and
optimisations one-at-a-time. It is done this way to more easily see how
the queued spinlocks are built, and to make performance and correctness
bisects more useful.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Drop paravirt.h & processor.h changes to fix 32-bit build]
[mpe: Fix 32-bit build of qspinlock.o & disallow GENERIC_LOCKBREAK per Nick]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/CONLLQB6DCJU.2ZPOS7T6S5GRR@bobo
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 699df27b0e2fc..7fbdf22ce9a97 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -96,7 +96,7 @@ config LOCKDEP_SUPPORT config GENERIC_LOCKBREAK bool default y - depends on SMP && PREEMPTION + depends on SMP && PREEMPTION && !PPC_QUEUED_SPINLOCKS config GENERIC_HWEIGHT bool @@ -154,7 +154,6 @@ config PPC select ARCH_USE_CMPXCHG_LOCKREF if PPC64 select ARCH_USE_MEMTEST select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS - select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |