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| author | Will Deacon <will.deacon@arm.com> | 2019-02-22 16:03:18 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-04-08 14:00:01 +0300 |
| commit | 08f1f3a72f4cea136686585b81a251baa3539f12 (patch) | |
| tree | e3cd9a94d5ec11823340c6f3821a1237c773a644 /arch/x86/include/asm/io.h | |
| parent | d51575621f0fd6c6dd62f7b29a0309425681b813 (diff) | |
| download | linux-08f1f3a72f4cea136686585b81a251baa3539f12.tar.xz | |
x86/io: Remove useless definition of mmiowb()
x86 maps mmiowb() to barrier(), but this is superfluous because a
compiler barrier is already implied by spin_unlock(). Since x86 also
includes asm-generic/io.h in its asm/io.h file, remove the definition
entirely and pick up the dummy definition from core code.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/x86/include/asm/io.h')
| -rw-r--r-- | arch/x86/include/asm/io.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 686247db3106..a06a9f8294ea 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -90,8 +90,6 @@ build_mmio_write(__writel, "l", unsigned int, "r", ) #define __raw_writew __writew #define __raw_writel __writel -#define mmiowb() barrier() - #ifdef CONFIG_X86_64 build_mmio_read(readq, "q", u64, "=r", :"memory") |