The patch titled
Subject: bitops: use the same mechanism for get_count_order[_long]
has been added to the -mm tree. Its filename is
bitops-use-the-same-mechanism-for-get_count_order.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/bitops-use-the-same-mechanism-for-get_count_order.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/bitops-use-the-same-mechanism-for-get_count_order.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Subject: bitops: use the same mechanism for get_count_order[_long]
These two functions share the same logic.
Link: https://lkml.kernel.org/r/20200807085837.11697-3-richard.weiyang@xxxxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/bitops.h | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/include/linux/bitops.h~bitops-use-the-same-mechanism-for-get_count_order
+++ a/include/linux/bitops.h
@@ -188,12 +188,10 @@ static inline unsigned fls_long(unsigned
static inline int get_count_order(unsigned int count)
{
- int order;
+ if (count == 0)
+ return -1;
- order = fls(count) - 1;
- if (count & (count - 1))
- order++;
- return order;
+ return fls(--count);
}
/**
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxxxxxxxxxx are
mm-mmap-rename-__vma_unlink_common-to-__vma_unlink.patch
mm-mmap-leverage-vma_rb_erase_ignore-to-implement-vma_rb_erase.patch
mm-page_reporting-drop-stale-list-head-check-in-page_reporting_cycle.patch
bitops-simplify-get_count_order_long.patch
bitops-use-the-same-mechanism-for-get_count_order.patch
