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kernel/fork.c: mark 'stack_vm_area' with __maybe_unused

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Fixes gcc '-Wunused-but-set-variable' warning when CONFIG_VMAP_STACK is
not set:

kernel/fork.c: In function 'dup_task_struct':
kernel/fork.c:843:20: warning:
 variable 'stack_vm_area' set but not used [-Wunused-but-set-variable]

Link: http://lkml.kernel.org/r/1545965190-2381-1-git-send-email-yuehaibing@huawei.com
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
YueHaibing 2018-12-28 00:40:00 -08:00 committed by Linus Torvalds
parent 7056d3a37d
commit 0f4991e8fd
1 changed files with 1 additions and 1 deletions
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kernel/fork.c
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@ -841,7 +841,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node)
{
struct task_struct *tsk;
unsigned long *stack;
struct vm_struct *stack_vm_area;
struct vm_struct *stack_vm_area __maybe_unused;
int err;
if (node == NUMA_NO_NODE)