From: Jason Xing <kernelxing@xxxxxxxxxxx>
In some environments (gcc treated as error in W=1, which is default), if we
make -C samples/bpf/, it will be stopped because of
"no previous prototype" error like this:
../samples/bpf/syscall_nrs.c:7:6:
error: no previous prototype for ‘syscall_defines’ [-Werror=missing-prototypes]
void syscall_defines(void)
^~~~~~~~~~~~~~~
Actually, this file meets our expectatations because it will be converted to
a .h file. In this way, it's correct. Considering the warnning stopping us
compiling, we can remove the warnning directly.
Signed-off-by: Jason Xing <kernelxing@xxxxxxxxxxx>
---
v3
Link: https://lore.kernel.org/all/20241001012540.39007-1-kerneljasonxing@xxxxxxxxx/
1. remove clang check (Andrii)
2. add matching pop at the bottom of that file (Andrii)
v2
Link: https://lore.kernel.org/all/CAEf4BzaVdr_0kQo=+jPLN++PvcU6pwTjaPVEA880kgDN94TZYw@xxxxxxxxxxxxxx/
1. use #pragma GCC diagnostic ignored to disable warnning (Andrii Nakryiko)
---
samples/bpf/syscall_nrs.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/samples/bpf/syscall_nrs.c b/samples/bpf/syscall_nrs.c
index 88f940052450..a6e600f3d477 100644
--- a/samples/bpf/syscall_nrs.c
+++ b/samples/bpf/syscall_nrs.c
@@ -2,6 +2,9 @@
#include <uapi/linux/unistd.h>
#include <linux/kbuild.h>
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+
#define SYSNR(_NR) DEFINE(SYS ## _NR, _NR)
void syscall_defines(void)
@@ -17,3 +20,5 @@ void syscall_defines(void)
#endif
}
+
+#pragma GCC diagnostic pop
--
2.37.3
