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| author | Kirill A. Shutemov <[email protected]> | 2016-01-20 22:58:12 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-01-21 01:09:18 +0000 |
| commit | f4be6153cca6c88eaf1e52931d9a010ad4ad940e (patch) | |
| tree | 3dea0998c95f9e339dba4f2191ea360738b188b4 /lib/string_helpers.c | |
| parent | thp: fix interrupt unsafe locking in split_huge_page() (diff) | |
| download | kernel-f4be6153cca6c88eaf1e52931d9a010ad4ad940e.tar.gz kernel-f4be6153cca6c88eaf1e52931d9a010ad4ad940e.zip | |
fs/proc/task_mmu.c: add workaround for old compilers
For THP=n, HPAGE_PMD_NR in smaps_account() expands to BUILD_BUG().
That's fine since this codepath is eliminated by modern compilers.
But older compilers have not that efficient dead code elimination. It
causes problem at least with gcc 4.1.2 on m68k:
fs/built-in.o: In function `smaps_account':
task_mmu.c:(.text+0x4f8fa): undefined reference to `__compiletime_assert_471'
Let's replace HPAGE_PMD_NR with 1 << compound_order(page).
Signed-off-by: Kirill A. Shutemov <[email protected]>
Reported-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions