mm: restore KERNEL_DS optimisations

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Restore the KERNEL_DS optimisation, especially helpful to the 2copy write
path.

This may be a pretty questionable gain in most cases, especially after the
legacy 2copy write path is removed, but it doesn't cost much.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Nick Piggin 2007-10-16 01:25:03 -07:00 • committed by Linus Torvalds

parent 8268f5a741

commit 674b892ede

1 changed files with 9 additions and 2 deletions

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mm/filemap.c

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