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Merge branch 'for-5.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu

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Pull percpu fix from Dennis Zhou:
 "This is a fix for the first chunk size calculation where the variable
  length array incorrectly used the number of longs instead of bytes of
  longs.

  This came in as a code fix and not a bug report, so I don't think it
  was widely problematic. I believe it worked out due to it being
  memblock memory and alignment requirements working in our favor"

* 'for-5.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  percpu: fix first chunk size calculation for populated bitmap
This commit is contained in:
Linus Torvalds 2020-09-17 18:05:29 -07:00
commit 10b82d5176
1 changed files with 1 additions and 1 deletions
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mm/percpu.c
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@ -1316,7 +1316,7 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
/* allocate chunk */
alloc_size = sizeof(struct pcpu_chunk) +
BITS_TO_LONGS(region_size >> PAGE_SHIFT);
BITS_TO_LONGS(region_size >> PAGE_SHIFT) * sizeof(unsigned long);
chunk = memblock_alloc(alloc_size, SMP_CACHE_BYTES);
if (!chunk)
panic("%s: Failed to allocate %zu bytes\n", __func__,