diff options
| author | Dezhong Diao <[email protected]> | 2010-10-13 16:57:35 -0700 |
|---|---|---|
| committer | Ralf Baechle <[email protected]> | 2011-07-25 17:26:52 +0100 |
| commit | e36863a550da44595b155c6b86ff46b50cbff5c0 (patch) | |
| tree | 62afb6746e304136bddec487a1361de22c48cc21 /tools/perf/scripts/python | |
| parent | d0be89f6c2570a63ac44ccdd12473a54243cd296 (diff) | |
MIPS: HIGHMEM DMA on noncoherent MIPS32 processors
[v4: Patch applies to linux-queue.git with kmap_atomic patches:
https://patchwork.kernel.org/patch/189932/
https://patchwork.kernel.org/patch/194552/
https://patchwork.kernel.org/patch/189912/ ]
The MIPS DMA coherency functions do not work properly (i.e. kernel oops)
when HIGHMEM pages are passed in as arguments. Use kmap_atomic() to
temporarily map high pages for cache maintenance operations.
Tested on a 2.6.36-rc7 1GB HIGHMEM SMP no-alias system.
Signed-off-by: Dezhong Diao <[email protected]>
Signed-off-by: Kevin Cernekee <[email protected]>
Cc: Dezhong Diao <[email protected]>
Cc: David Daney <[email protected]>
Cc: David VomLehn <[email protected]>
Cc: Sergei Shtylyov <[email protected]>
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1695/
Signed-off-by: Ralf Baechle <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
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