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-rw-r--r--arch/x86/mm/tlb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 613cd83..a085c56 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -320,7 +320,7 @@ static ssize_t tlbflush_write_file(struct file *file,
if (kstrtos8(buf, 0, &shift))
return -EINVAL;
- if (shift > 64)
+ if (shift < -1 || shift >= BITS_PER_LONG)
return -EINVAL;
tlb_flushall_shift = shift;