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mm/mremap: fix BUILD_BUG_ON() error in get_extent 

clang can't evaluate this function argument at compile time when the
function is not inlined, which leads to a link time failure:

  ld.lld: error: undefined symbol: __compiletime_assert_414
  >>> referenced by mremap.c
  >>>               mremap.o:(get_extent) in archive mm/built-in.a

Mark the function as __always_inline to avoid it.

Link: https://lkml.kernel.org/r/20201230154104.522605-1-arnd@kernel.org
Fixes: 9ad9718bfa ("mm/mremap: calculate extent in one place")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Brian Geffon <bgeffon@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2021-02-09 13:42:10 -08:00 committed by Linus Torvalds
parent 793f49a87a
commit a30a29091b
1 changed files with 3 additions and 2 deletions
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5
mm/mremap.c
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@ -336,8 +336,9 @@ enum pgt_entry {
* valid. Else returns a smaller extent bounded by the end of the source and
* destination pgt_entry.
*/
static unsigned long get_extent(enum pgt_entry entry, unsigned long old_addr,
unsigned long old_end, unsigned long new_addr)
static __always_inline unsigned long get_extent(enum pgt_entry entry,
unsigned long old_addr, unsigned long old_end,
unsigned long new_addr)
{
unsigned long next, extent, mask, size;