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Fix bitmap64 corner case.

This commit is contained in:
TXuian 2024-05-19 17:37:52 +08:00
parent 4803239498
commit 29f1df2eea
1 changed files with 2 additions and 2 deletions
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4
Ubiquitous/XiZi_AIoT/softkernel/include/bitmap64.h
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@ -47,9 +47,9 @@ static inline int bitmap64_alloc(struct bitmap64* bitmap)
{ {
int free_bit = -1; int free_bit = -1;
// free bit is the first 0 bit, from [1, 64] // free bit is the first 0 bit, from [1, 64]
free_bit = __builtin_ffsll(~(bitmap->map)); free_bit = __builtin_ffsl(~(uint64_t)(bitmap->map));
// handle if bitmap is full (no using 64th bit here) // handle if bitmap is full (no using 64th bit here)
if (free_bit == 64) { if (free_bit == 0) {
return -1; return -1;
} }
assert(free_bit < 64 && free_bit >= 1); assert(free_bit < 64 && free_bit >= 1);