lib: count_zeros: unify count_{leading,trailing}_zeros()

Browse source

The 'leading' helper returns BITS_PER_LONG if x == 0, while 'trailing'
one returns COUNT_TRAILING_ZEROS_0, which turns to be -1.

None of the current users explicitly check the returned value for
COUNT_TRAILING_ZEROS_0, except the loongarch, which tests implicitly
for the '>= 0'.

So, align count_trailing_zeros() with the count_leading_zeros(), and
simplify the loongarch handling.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Yury Norov <ynorov@nvidia.com>

...

This commit is contained in:

Yury Norov 2026-03-23 12:17:12 -04:00

parent 4e64c91b81

commit be56db15fc

2 changed files with 4 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

arch/loongarch/kvm/intc/eiointc.c

View file

6

include/linux/count_zeros.h

View file