io: define stronger ordering for the default writeX() implementation

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The default implementation of mapping writeX() to __raw_writeX() is wrong.
writeX() has stronger ordering semantics. Compiler is allowed to reorder
memory writes against __raw_writeX().

Use the previously defined __io_aw() and __io_bw() macros to harden
code generation according to architecture support.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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Sinan Kaya 2018-04-05 09:09:11 -04:00 • committed by Arnd Bergmann

parent 032d59e1cd

commit 755bd04aaf

1 changed files with 8 additions and 0 deletions

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8

include/asm-generic/io.h

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