dd4e5d6106
Remove mmiowb() from the kernel memory barrier API and instead, for architectures that need it, hide the barrier inside spin_unlock() when MMIO has been performed inside the critical section. -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAlzMFaUACgkQt6xw3ITB YzRICQgAiv7wF/yIbBhDOmCNCAKDO59chvFQWxXWdGk/aAB56kwKAMXJgLOvlMG/ VRuuLyParTFQETC3jaxKgnO/1hb+PZLDt2Q2KqixtjIzBypKUPWvK2sf6THhSRF1 GK0DBVUd1rCrWrR815+SPb8el4xXtdBzvAVB+Fx35PXVNpdRdqCkK+EQ6UnXGokm rXXHbnfsnquBDtmb4CR4r2beH+aNElXbdt0Kj8VcE5J7f7jTdW3z6Q9WFRvdKmK7 yrsxXXB2w/EsWXOwFp0SLTV5+fgeGgTvv8uLjDw+SG6t0E0PebxjNAflT7dPrbYL WecjKC9WqBxrGY+4ew6YJP70ijLBCw== =aC8m -----END PGP SIGNATURE----- Merge tag 'arm64-mmiowb' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull mmiowb removal from Will Deacon: "Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb()) Remove mmiowb() from the kernel memory barrier API and instead, for architectures that need it, hide the barrier inside spin_unlock() when MMIO has been performed inside the critical section. The only relatively recent changes have been addressing review comments on the documentation, which is in a much better shape thanks to the efforts of Ben and Ingo. I was initially planning to split this into two pull requests so that you could run the coccinelle script yourself, however it's been plain sailing in linux-next so I've just included the whole lot here to keep things simple" * tag 'arm64-mmiowb' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (23 commits) docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread docs/memory-barriers.txt: Fix style, spacing and grammar in I/O section arch: Remove dummy mmiowb() definitions from arch code net/ethernet/silan/sc92031: Remove stale comment about mmiowb() i40iw: Redefine i40iw_mmiowb() to do nothing scsi/qla1280: Remove stale comment about mmiowb() drivers: Remove explicit invocations of mmiowb() drivers: Remove useless trailing comments from mmiowb() invocations Documentation: Kill all references to mmiowb() riscv/mmiowb: Hook up mmwiob() implementation to asm-generic code powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic code ia64/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() mips/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() sh/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() m68k/io: Remove useless definition of mmiowb() nds32/io: Remove useless definition of mmiowb() x86/io: Remove useless definition of mmiowb() arm64/io: Remove useless definition of mmiowb() ARM/io: Remove useless definition of mmiowb() mmiowb: Hook up mmiowb helpers to spinlocks and generic I/O accessors ...
261 lines
4.9 KiB
Plaintext
261 lines
4.9 KiB
Plaintext
#
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# The ARCH_INLINE foo is necessary because select ignores "depends on"
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#
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config ARCH_INLINE_SPIN_TRYLOCK
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bool
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config ARCH_INLINE_SPIN_TRYLOCK_BH
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bool
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config ARCH_INLINE_SPIN_LOCK
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bool
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config ARCH_INLINE_SPIN_LOCK_BH
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bool
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config ARCH_INLINE_SPIN_LOCK_IRQ
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bool
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config ARCH_INLINE_SPIN_LOCK_IRQSAVE
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bool
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config ARCH_INLINE_SPIN_UNLOCK
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bool
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config ARCH_INLINE_SPIN_UNLOCK_BH
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bool
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config ARCH_INLINE_SPIN_UNLOCK_IRQ
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bool
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config ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
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bool
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config ARCH_INLINE_READ_TRYLOCK
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bool
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config ARCH_INLINE_READ_LOCK
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bool
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config ARCH_INLINE_READ_LOCK_BH
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bool
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config ARCH_INLINE_READ_LOCK_IRQ
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bool
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config ARCH_INLINE_READ_LOCK_IRQSAVE
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bool
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config ARCH_INLINE_READ_UNLOCK
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bool
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config ARCH_INLINE_READ_UNLOCK_BH
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bool
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config ARCH_INLINE_READ_UNLOCK_IRQ
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bool
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config ARCH_INLINE_READ_UNLOCK_IRQRESTORE
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bool
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config ARCH_INLINE_WRITE_TRYLOCK
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bool
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config ARCH_INLINE_WRITE_LOCK
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bool
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config ARCH_INLINE_WRITE_LOCK_BH
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bool
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config ARCH_INLINE_WRITE_LOCK_IRQ
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bool
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config ARCH_INLINE_WRITE_LOCK_IRQSAVE
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bool
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config ARCH_INLINE_WRITE_UNLOCK
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bool
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config ARCH_INLINE_WRITE_UNLOCK_BH
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bool
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config ARCH_INLINE_WRITE_UNLOCK_IRQ
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bool
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config ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
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bool
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config UNINLINE_SPIN_UNLOCK
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bool
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#
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# lock_* functions are inlined when:
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# - DEBUG_SPINLOCK=n and GENERIC_LOCKBREAK=n and ARCH_INLINE_*LOCK=y
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#
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# trylock_* functions are inlined when:
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# - DEBUG_SPINLOCK=n and ARCH_INLINE_*LOCK=y
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#
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# unlock and unlock_irq functions are inlined when:
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# - DEBUG_SPINLOCK=n and ARCH_INLINE_*LOCK=y
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# or
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# - DEBUG_SPINLOCK=n and PREEMPT=n
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#
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# unlock_bh and unlock_irqrestore functions are inlined when:
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# - DEBUG_SPINLOCK=n and ARCH_INLINE_*LOCK=y
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#
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if !DEBUG_SPINLOCK
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config INLINE_SPIN_TRYLOCK
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def_bool y
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depends on ARCH_INLINE_SPIN_TRYLOCK
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config INLINE_SPIN_TRYLOCK_BH
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def_bool y
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depends on ARCH_INLINE_SPIN_TRYLOCK_BH
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config INLINE_SPIN_LOCK
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_SPIN_LOCK
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config INLINE_SPIN_LOCK_BH
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_SPIN_LOCK_BH
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config INLINE_SPIN_LOCK_IRQ
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_SPIN_LOCK_IRQ
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config INLINE_SPIN_LOCK_IRQSAVE
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_SPIN_LOCK_IRQSAVE
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config INLINE_SPIN_UNLOCK_BH
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def_bool y
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depends on ARCH_INLINE_SPIN_UNLOCK_BH
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config INLINE_SPIN_UNLOCK_IRQ
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def_bool y
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depends on !PREEMPT || ARCH_INLINE_SPIN_UNLOCK_IRQ
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config INLINE_SPIN_UNLOCK_IRQRESTORE
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def_bool y
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depends on ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
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config INLINE_READ_TRYLOCK
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def_bool y
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depends on ARCH_INLINE_READ_TRYLOCK
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config INLINE_READ_LOCK
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_READ_LOCK
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config INLINE_READ_LOCK_BH
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_READ_LOCK_BH
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config INLINE_READ_LOCK_IRQ
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_READ_LOCK_IRQ
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config INLINE_READ_LOCK_IRQSAVE
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_READ_LOCK_IRQSAVE
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config INLINE_READ_UNLOCK
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def_bool y
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depends on !PREEMPT || ARCH_INLINE_READ_UNLOCK
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config INLINE_READ_UNLOCK_BH
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def_bool y
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depends on ARCH_INLINE_READ_UNLOCK_BH
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config INLINE_READ_UNLOCK_IRQ
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def_bool y
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depends on !PREEMPT || ARCH_INLINE_READ_UNLOCK_IRQ
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config INLINE_READ_UNLOCK_IRQRESTORE
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def_bool y
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depends on ARCH_INLINE_READ_UNLOCK_IRQRESTORE
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config INLINE_WRITE_TRYLOCK
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def_bool y
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depends on ARCH_INLINE_WRITE_TRYLOCK
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config INLINE_WRITE_LOCK
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_WRITE_LOCK
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config INLINE_WRITE_LOCK_BH
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_WRITE_LOCK_BH
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config INLINE_WRITE_LOCK_IRQ
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_WRITE_LOCK_IRQ
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config INLINE_WRITE_LOCK_IRQSAVE
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def_bool y
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depends on !GENERIC_LOCKBREAK && ARCH_INLINE_WRITE_LOCK_IRQSAVE
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config INLINE_WRITE_UNLOCK
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def_bool y
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depends on !PREEMPT || ARCH_INLINE_WRITE_UNLOCK
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config INLINE_WRITE_UNLOCK_BH
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def_bool y
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depends on ARCH_INLINE_WRITE_UNLOCK_BH
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config INLINE_WRITE_UNLOCK_IRQ
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def_bool y
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depends on !PREEMPT || ARCH_INLINE_WRITE_UNLOCK_IRQ
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config INLINE_WRITE_UNLOCK_IRQRESTORE
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def_bool y
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depends on ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
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endif
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config ARCH_SUPPORTS_ATOMIC_RMW
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bool
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config MUTEX_SPIN_ON_OWNER
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def_bool y
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depends on SMP && ARCH_SUPPORTS_ATOMIC_RMW
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config RWSEM_SPIN_ON_OWNER
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def_bool y
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depends on SMP && ARCH_SUPPORTS_ATOMIC_RMW
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config LOCK_SPIN_ON_OWNER
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def_bool y
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depends on MUTEX_SPIN_ON_OWNER || RWSEM_SPIN_ON_OWNER
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config ARCH_USE_QUEUED_SPINLOCKS
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bool
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config QUEUED_SPINLOCKS
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def_bool y if ARCH_USE_QUEUED_SPINLOCKS
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depends on SMP
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config BPF_ARCH_SPINLOCK
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bool
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config ARCH_USE_QUEUED_RWLOCKS
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bool
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config QUEUED_RWLOCKS
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def_bool y if ARCH_USE_QUEUED_RWLOCKS
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depends on SMP
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config ARCH_HAS_MMIOWB
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bool
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config MMIOWB
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def_bool y if ARCH_HAS_MMIOWB
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depends on SMP
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