csky: Support kernel non-aligned access

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We prohibit non-aligned access in kernel mode, but some special NIC
driver needs to support kernel-state unaligned access. For example,
when the bus does not support unaligned access, IP header parsing
will cause non-aligned access and driver does not recopy the skb
buffer to dma for performance reasons.

Added kernel_enable & user_enable to control unaligned access and
added kernel_count  & user_count for statistical unaligned access.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>

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This commit is contained in:

Guo Ren 2019-08-20 20:15:44 +08:00

parent dc140045c0

commit c7e6f0e992

1 changed files with 45 additions and 17 deletions

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arch/csky/abiv1/alignment.c

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