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| author |   Pankaj Raghav <p.raghav@samsung.com> | 2024-01-15 11:25:22 +0100 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-02-22 10:24:38 -0800 |
| commit | e03c16fb4af1dfc615a4e1f51be0d5fe5840b904 (patch) | |
| tree | 706962b309671906187803f1bb0e26be724443dc /mm/memory.c | |
| parent | fs/proc/task_mmu.c: add_to_pagemap: remove useless parameter addr (diff) | |
| download | wireguard-linux-e03c16fb4af1dfc615a4e1f51be0d5fe5840b904.tar.xz wireguard-linux-e03c16fb4af1dfc615a4e1f51be0d5fe5840b904.zip | |
readahead: use ilog2 instead of a while loop in page_cache_ra_order()
A while loop is used to adjust the new_order to be lower than the
ra->size. ilog2 could be used to do the same instead of using a loop.
ilog2 typically resolves to a bit scan reverse instruction. This is
particularly useful when ra->size is smaller than the 2^new_order as it
resolves in one instruction instead of looping to find the new_order.
No functional changes.
Link: https://lkml.kernel.org/r/20240115102523.2336742-1-kernel@pankajraghav.com
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
0 files changed, 0 insertions, 0 deletions