Blackfin: optimize fixed code handling for the most common case

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The majority of the time we are returning to user space, it is not in the
fixed atomic code region.  So rather than branch to a function where we
check the PC and return, do the check inline and branch only when needed.

Also, tweak some of the fixed code handling based on assumptions we are
aware of but cannot be expressed in C.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

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This commit is contained in:

Mike Frysinger 2009-08-17 19:05:07 +00:00

parent dac981740f

commit 926494943b

2 changed files with 8 additions and 8 deletions

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10

arch/blackfin/kernel/process.c

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6

arch/blackfin/mach-common/entry.S

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