Hi Cai, On Wed, 9 Feb 2022 10:35:59 +0800 Cai Huoqing <cai.huoqing@xxxxxxxxx> wrote: > > Avoid the error-unused variable 'migration' when > CONFIG_TRANSPARENT_HUGEPAGE and CONFIG_ARCH_ENABLE_THP_MIGRATION > are not enabled. > > Signed-off-by: Cai Huoqing <cai.huoqing@xxxxxxxxx> > --- > fs/proc/task_mmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c > index bc2f46033231..b055ff29204d 100644 > --- a/fs/proc/task_mmu.c > +++ b/fs/proc/task_mmu.c > @@ -1441,7 +1441,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end, > spinlock_t *ptl; > pte_t *pte, *orig_pte; > int err = 0; > - bool migration = false; > + bool migration __maybe_unused = false; > > #ifdef CONFIG_TRANSPARENT_HUGEPAGE > ptl = pmd_trans_huge_lock(pmdp, vma); > -- > 2.25.1 > This has already been fixed in Andrew's patch set by moving the "#ifdef CONFIG_TRANSPARENT_HUGEPAGE" above the "migration" declaration. -- Cheers, Stephen Rothwell
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