1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/vsyscall.c b/arch/x86_64/kernel/vsyscall.c
index 3785e4954734..4a673f5397a0 100644
--- a/arch/x86_64/kernel/vsyscall.c
+++ b/arch/x86_64/kernel/vsyscall.c
@@ -289,6 +289,7 @@ static void __init map_vsyscall(void)
         extern char __vsyscall_0;
         unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0);
 
+        /* Note that VSYSCALL_MAPPED_PAGES must agree with the code below. */
         __set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL);
 }