mm/writeback: minor clean up for highmem_dirtyable_memory

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Since commit a804552b9a ("mm/page-writeback.c: fix
dirty_balance_reserve subtraction from dirtyable memory"), local
variable x can not be negative.  And it can not overflow when it is the
total number of dirtyable highmem pages.  Thus remove the unneeded
comment and overflow check.

Link: https://lkml.kernel.org/r/20220224115416.46089-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Miaohe Lin 2022-03-22 14:39:31 -07:00 • committed by Linus Torvalds

parent eb5279fb7e

commit 854d8e3616

1 changed files with 0 additions and 12 deletions

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mm/page-writeback.c

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