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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-07 02:57:52 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-07 02:57:52 +0300 |
| commit | dd4e5d6106b2380e2c1238406d26df8b2fe1c42c (patch) | |
| tree | 33eb172237dd8873de02d5b881bf17cf58d05fab /drivers/infiniband/hw/hfi1/chip.c | |
| parent | 14be4c61c205dcb0a72251c1e2790814181bd9ba (diff) | |
| parent | 9726840d9cf0d42377e1591263d7c1d9ae0988ac (diff) | |
| download | linux-dd4e5d6106b2380e2c1238406d26df8b2fe1c42c.tar.xz | |
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/infiniband/hw/hfi1/chip.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/chip.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c index 9784c6c0d2ec..addefae16c9c 100644 --- a/drivers/infiniband/hw/hfi1/chip.c +++ b/drivers/infiniband/hw/hfi1/chip.c @@ -8365,7 +8365,6 @@ static inline void clear_recv_intr(struct hfi1_ctxtdata *rcd) struct hfi1_devdata *dd = rcd->dd; u32 addr = CCE_INT_CLEAR + (8 * rcd->ireg); - mmiowb(); /* make sure everything before is written */ write_csr(dd, addr, rcd->imask); /* force the above write on the chip and get a value back */ (void)read_csr(dd, addr); @@ -11803,12 +11802,10 @@ void update_usrhead(struct hfi1_ctxtdata *rcd, u32 hd, u32 updegr, u32 egrhd, << RCV_EGR_INDEX_HEAD_HEAD_SHIFT; write_uctxt_csr(dd, ctxt, RCV_EGR_INDEX_HEAD, reg); } - mmiowb(); reg = ((u64)rcv_intr_count << RCV_HDR_HEAD_COUNTER_SHIFT) | (((u64)hd & RCV_HDR_HEAD_HEAD_MASK) << RCV_HDR_HEAD_HEAD_SHIFT); write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, reg); - mmiowb(); } u32 hdrqempty(struct hfi1_ctxtdata *rcd) |