When building with -Wimplicit-fallthrough we get a warning

tools/fdt_add_pubkey.c:52:25: warning: this statement may fall through [-Wimplicit-fallthrough=] 52 | print_help(); |

Explicitly declare which functions don't return.

Fixes: 30238e99619c ("tools: add fdt_add_pubkey") Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com --- tools/fdt_add_pubkey.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/fdt_add_pubkey.c b/tools/fdt_add_pubkey.c index 999f5a7e83..aa1c3d5b52 100644 --- a/tools/fdt_add_pubkey.c +++ b/tools/fdt_add_pubkey.c @@ -10,7 +10,7 @@ static const char *keyname = "key"; /* -n <keyname> */ static const char *require_keys; /* -r <conf|image> */ static const char *keydest; /* argv[n] */

-static void print_usage(const char *msg) +static void __attribute__((__noreturn__)) print_usage(const char *msg) { fprintf(stderr, "Error: %s\n", msg); fprintf(stderr, "Usage: %s [-a <algo>] [-k <keydir>] [-n <keyname>] [-r <conf|image>]" @@ -19,7 +19,7 @@ static void print_usage(const char *msg) exit(EXIT_FAILURE); }

-static void print_help(void) +static void __attribute__((__noreturn__)) print_help(void) { fprintf(stderr, "Options:\n" "\t-a <algo> Cryptographic algorithm. Optional parameter, default value: sha1,rsa2048\n"