diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 16:57:52 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 16:57:52 -0700 |
commit | dd4e5d6106b2380e2c1238406d26df8b2fe1c42c (patch) | |
tree | 33eb172237dd8873de02d5b881bf17cf58d05fab /drivers/staging/comedi/drivers/mite.c | |
parent | Merge tag 's390-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux (diff) | |
parent | docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread (diff) | |
download | linux-dev-dd4e5d6106b2380e2c1238406d26df8b2fe1c42c.tar.xz linux-dev-dd4e5d6106b2380e2c1238406d26df8b2fe1c42c.zip |
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
...
Diffstat (limited to 'drivers/staging/comedi/drivers/mite.c')
-rw-r--r-- | drivers/staging/comedi/drivers/mite.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/staging/comedi/drivers/mite.c b/drivers/staging/comedi/drivers/mite.c index 61e03ad84123..639ec1586976 100644 --- a/drivers/staging/comedi/drivers/mite.c +++ b/drivers/staging/comedi/drivers/mite.c @@ -371,7 +371,6 @@ static unsigned int mite_get_status(struct mite_channel *mite_chan) writel(CHOR_CLRDONE, mite->mmio + MITE_CHOR(mite_chan->channel)); } - mmiowb(); spin_unlock_irqrestore(&mite->lock, flags); return status; } @@ -451,7 +450,6 @@ void mite_dma_arm(struct mite_channel *mite_chan) mite_chan->done = 0; /* arm */ writel(CHOR_START, mite->mmio + MITE_CHOR(mite_chan->channel)); - mmiowb(); spin_unlock_irqrestore(&mite->lock, flags); } EXPORT_SYMBOL_GPL(mite_dma_arm); @@ -638,7 +636,6 @@ void mite_release_channel(struct mite_channel *mite_chan) CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE, mite->mmio + MITE_CHCR(mite_chan->channel)); mite_chan->ring = NULL; - mmiowb(); } spin_unlock_irqrestore(&mite->lock, flags); } |