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os/bluestore: use std::countl_zero() when appropriate

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prefer the facilities provided by standard library over the homebrew
ones for better readability and maintainability.

Signed-off-by: Kefu Chai <tchaikov@gmail.com>
This commit is contained in:
Kefu Chai 2022-08-22 00:41:52 +08:00
parent dc92dfc9c3
commit e132be7ee5
1 changed files with 2 additions and 1 deletions
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3
src/os/bluestore/Allocator.cc
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@ -2,6 +2,7 @@
// vim: ts=8 sw=2 smarttab
#include "Allocator.h"
#include <bit>
#include "StupidAllocator.h"
#include "BitmapAllocator.h"
#include "AvlAllocator.h"
@ -194,7 +195,7 @@ double Allocator::get_fragmentation_score()
size_t sum = 0;
auto get_score = [&](size_t v) -> double {
size_t sc = sizeof(v) * 8 - clz(v) - 1; //assign to grade depending on log2(len)
size_t sc = sizeof(v) * 8 - std::countl_zero(v) - 1; //assign to grade depending on log2(len)
while (scales.size() <= sc + 1) {
//unlikely expand scales vector
scales.push_back(scales[scales.size() - 1] * double_size_worth);