https://github.com/torvalds/linux
Revision 92d7223a74235054f2aa7227d207d9c57f84dca0 authored by Sinan Kaya on 16 April 2018, 22:16:56 UTC, committed by Matt Turner on 23 May 2018, 01:10:36 UTC
memory-barriers.txt has been updated with the following requirement. "When using writel(), a prior wmb() is not needed to guarantee that the cache coherent memory writes have completed before writing to the MMIO region." Current writeX() and iowriteX() implementations on alpha are not satisfying this requirement as the barrier is after the register write. Move mb() in writeX() and iowriteX() functions to guarantee that HW observes memory changes before performing register operations. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Matt Turner <mattst88@gmail.com>
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History 
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Tip revision: 92d7223a74235054f2aa7227d207d9c57f84dca0 authored by Sinan Kaya on 16 April 2018, 22:16:56 UTC
alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering #2
alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering #2
Tip revision: 92d7223
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 12.8 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.5 KB |
| .mailmap | -rw-r--r-- | 9.2 KB |
| COPYING | -rw-r--r-- | 423 bytes |
| CREDITS | -rw-r--r-- | 96.3 KB |
| Kbuild | -rw-r--r-- | 2.2 KB |
| Kconfig | -rw-r--r-- | 287 bytes |
| MAINTAINERS | -rw-r--r-- | 442.6 KB |
| Makefile | -rw-r--r-- | 61.0 KB |
| README | -rw-r--r-- | 800 bytes |
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