From: Toshi Kani <toshi.kani@xxxxxxx> shmem_get_unmapped_area() checks SHMEM_SB(sb)->huge incorrectly, which leads to a reversed effect of "huge=" mount option. Fix the check in shmem_get_unmapped_area(). Note, the default value of SHMEM_SB(sb)->huge remains as SHMEM_HUGE_NEVER. User will need to specify "huge=" option to enable huge page mappings. Reported-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx> Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx> --- mm/shmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 4.8-rc7/mm/shmem.c 2016-08-14 20:17:02.388843463 -0700 +++ linux/mm/shmem.c 2016-09-22 19:41:29.057848626 -0700 @@ -1980,7 +1980,7 @@ unsigned long shmem_get_unmapped_area(st return addr; sb = shm_mnt->mnt_sb; } - if (SHMEM_SB(sb)->huge != SHMEM_HUGE_NEVER) + if (SHMEM_SB(sb)->huge == SHMEM_HUGE_NEVER) return addr; } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>