diff options
| author | Dezhong Diao <dediao@cisco.com> | 2010-10-13 16:57:35 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-07-25 17:26:52 +0100 |
| commit | e36863a550da44595b155c6b86ff46b50cbff5c0 (patch) | |
| tree | 62afb6746e304136bddec487a1361de22c48cc21 /kernel/kmod.c | |
| 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 <dediao@cisco.com>
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: Dezhong Diao <dediao@cisco.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: David VomLehn <dvomlehn@cisco.com>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1695/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'kernel/kmod.c')
0 files changed, 0 insertions, 0 deletions