mm/memblock.c: warn if zero alignment was requested
authorMike Rapoport <rppt@linux.vnet.ibm.com>
Tue, 30 Oct 2018 22:10:01 +0000 (15:10 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 31 Oct 2018 15:54:17 +0000 (08:54 -0700)
commit2f770806fd2c3db9616965e57ba60d80f43c827d
treeb5b7687c0a32a69f46fde6b649f6105925e06b1f
parent7e1c4e27928e5f87b9b1eaf06dc31773b2f1e7f1
mm/memblock.c: warn if zero alignment was requested

After updating all memblock users to explicitly specify SMP_CACHE_BYTES
alignment rather than use 0, it is still possible that uncovered users may
sneak in.  Add a WARN_ON_ONCE for such cases.

[sfr@canb.auug.org.au: use dump_stack() instead of WARN_ON_ONCE for the alignment checks]
Link: http://lkml.kernel.org/r/20181016131927.6ceba6ab@canb.auug.org.au
[akpm@linux-foundation.org: add apologetic comment]
Link: http://lkml.kernel.org/r/20181011060850.GA19822@rapoport-lnx
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memblock.c