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util: Zero out all of mask in util_set_thread_affinity

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memset operates in bytes, and there are 8-bits in a byte.  This is a
very easy to miss typo. :(

Fixes: 9758b1d416 ("util: add util_set_thread_affinity helpers including Windows support")

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11228>
This commit is contained in:
Ian Romanick 2021-06-08 15:08:50 -07:00 • committed by Marge Bot
parent 5971f29c8f
commit a923e95b10
1 changed files with 2 additions and 2 deletions
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4
src/util/u_thread.h
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@ -175,7 +175,7 @@ util_set_thread_affinity(thrd_t thread,
if (pthread_getaffinity_np(thread, sizeof(cpuset), &cpuset) != 0)
return false;
memset(old_mask, 0, num_mask_bits / 32);
memset(old_mask, 0, num_mask_bits / 8);
for (unsigned i = 0; i < num_mask_bits && i < CPU_SETSIZE; i++) {
if (CPU_ISSET(i, &cpuset))
old_mask[i / 32] |= 1u << (i % 32);
@ -200,7 +200,7 @@ util_set_thread_affinity(thrd_t thread,
return false;
if (old_mask) {
memset(old_mask, 0, num_mask_bits / 32);
memset(old_mask, 0, num_mask_bits / 8);
old_mask[0] = m;
#ifdef _WIN64