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authorQian Cai <cai@lca.pw>2019-03-06 02:50:00 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-06 08:07:21 +0300
commit70516b936bb0afac4fa2fc54a5e61870ece998da (patch)
tree43a90b1c67815bf0a3d44ae697256ee82bed79bf /mm
parentcd02cf1aceeac5b0bbbb2d6fbf614c987dcd396f (diff)
downloadlinux-70516b936bb0afac4fa2fc54a5e61870ece998da.tar.xz
mm/huge_memory.c: fix "orig_pud" set but not used
Commit a00cc7d9dd93 ("mm, x86: add support for PUD-sized transparent hugepages") introduced pudp_huge_get_and_clear_full() but no one uses its return code. In order to not diverge from pmdp_huge_get_and_clear_full(), just change zap_huge_pud() to not assign the return value from pudp_huge_get_and_clear_full(). mm/huge_memory.c: In function 'zap_huge_pud': mm/huge_memory.c:1982:8: warning: variable 'orig_pud' set but not used [-Wunused-but-set-variable] pud_t orig_pud; ^~~~~~~~ Link: http://lkml.kernel.org/r/20190301221956.97493-1-cai@lca.pw Signed-off-by: Qian Cai <cai@lca.pw> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/huge_memory.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index fcf657886b4b..404acdcd0455 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1982,7 +1982,6 @@ spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma)
int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma,
pud_t *pud, unsigned long addr)
{
- pud_t orig_pud;
spinlock_t *ptl;
ptl = __pud_trans_huge_lock(pud, vma);
@@ -1994,8 +1993,7 @@ int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma,
* pgtable_trans_huge_withdraw after finishing pudp related
* operations.
*/
- orig_pud = pudp_huge_get_and_clear_full(tlb->mm, addr, pud,
- tlb->fullmm);
+ pudp_huge_get_and_clear_full(tlb->mm, addr, pud, tlb->fullmm);
tlb_remove_pud_tlb_entry(tlb, pud, addr);
if (vma_is_dax(vma)) {
spin_unlock(ptl);