seccomp.2: Use ARRAY_SIZE() macro instead of raw sizeof division

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man2/seccomp.2 b/man2/seccomp.2
index d6b856c326dedd4888c78a84ab2125cc9b660c11..82eb04dc606c5910db621095a2726401695a4890 100644 (file)
--- a/man2/seccomp.2
+++ b/man2/seccomp.2
@@ -1051,6 +1051,7 @@ cecilia
 #include <sys/prctl.h>
 
 #define X32_SYSCALL_BIT 0x40000000
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 
 static int
 install_filter(int syscall_nr, int t_arch, int f_errno)
@@ -1101,7 +1102,7 @@ install_filter(int syscall_nr, int t_arch, int f_errno)
     };
 
     struct sock_fprog prog = {
-        .len = sizeof(filter) / sizeof(filter[0]),
+        .len = ARRAY_SIZE(filter),
         .filter = filter,
     };