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| author | Wei Yang <[email protected]> | 2024-04-16 01:25:59 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-05-06 00:53:40 +0000 |
| commit | 122ff80e12b3aa586d702b7fb651a99d443e7777 (patch) | |
| tree | 42829920f2980eca95d987e4288c6779783a7224 /mm/sparse.c | |
| parent | doc: split buffer.rst out of api-summary.rst (diff) | |
| download | kernel-122ff80e12b3aa586d702b7fb651a99d443e7777.tar.gz kernel-122ff80e12b3aa586d702b7fb651a99d443e7777.zip | |
mm/sparse: guard the size of mem_section is power of 2
We usually have this check, while commit 2a3cb8baef71 ("mm/sparse: delete
old sparse_init and enable new one") missed to take it.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Wei Yang <[email protected]>
Acked-by: Oscar Salvador <[email protected]>
Reviewed-by: Pasha Tatashin <[email protected]>
Cc: "Mike Rapoport (IBM)" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 46e88549d1a6..de40b2c73406 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -560,6 +560,8 @@ void __init sparse_init(void) unsigned long pnum_end, pnum_begin, map_count = 1; int nid_begin; + /* see include/linux/mmzone.h 'struct mem_section' definition */ + BUILD_BUG_ON(!is_power_of_2(sizeof(struct mem_section))); memblocks_present(); pnum_begin = first_present_section_nr(); |