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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 16:57:52 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 16:57:52 -0700 |
commit | dd4e5d6106b2380e2c1238406d26df8b2fe1c42c (patch) | |
tree | 33eb172237dd8873de02d5b881bf17cf58d05fab /arch/ia64/include/asm/io.h | |
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 'arch/ia64/include/asm/io.h')
-rw-r--r-- | arch/ia64/include/asm/io.h | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h index 1e6fef69bb01..a511d62d447a 100644 --- a/arch/ia64/include/asm/io.h +++ b/arch/ia64/include/asm/io.h @@ -113,20 +113,6 @@ extern int valid_mmap_phys_addr_range (unsigned long pfn, size_t count); */ #define __ia64_mf_a() ia64_mfa() -/** - * ___ia64_mmiowb - I/O write barrier - * - * Ensure ordering of I/O space writes. This will make sure that writes - * following the barrier will arrive after all previous writes. For most - * ia64 platforms, this is a simple 'mf.a' instruction. - * - * See Documentation/driver-api/device-io.rst for more information. - */ -static inline void ___ia64_mmiowb(void) -{ - ia64_mfa(); -} - static inline void* __ia64_mk_io_addr (unsigned long port) { @@ -161,7 +147,6 @@ __ia64_mk_io_addr (unsigned long port) #define __ia64_writew ___ia64_writew #define __ia64_writel ___ia64_writel #define __ia64_writeq ___ia64_writeq -#define __ia64_mmiowb ___ia64_mmiowb /* * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access to ensure @@ -296,7 +281,6 @@ __outsl (unsigned long port, const void *src, unsigned long count) #define __outb platform_outb #define __outw platform_outw #define __outl platform_outl -#define __mmiowb platform_mmiowb #define inb(p) __inb(p) #define inw(p) __inw(p) @@ -310,7 +294,6 @@ __outsl (unsigned long port, const void *src, unsigned long count) #define outsb(p,s,c) __outsb(p,s,c) #define outsw(p,s,c) __outsw(p,s,c) #define outsl(p,s,c) __outsl(p,s,c) -#define mmiowb() __mmiowb() /* * The address passed to these functions are ioremap()ped already. |