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bpf: annotate BTF show functions with __printf

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-Werror=suggest-attribute=format warns about two functions
in kernel/bpf/btf.c [1]; add __printf() annotations to silence
these warnings since for CONFIG_WERROR=y they will trigger
build failures.

[1] https://lore.kernel.org/bpf/a8b20c72-6631-4404-9e1f-0410642d7d20@gmail.com/

Fixes: 31d0bc8163 ("bpf: Move to generic BTF show support, apply it to seq files/strings")
Reported-by: Mirsad Todorovac <mtodorovac69@gmail.com>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Tested-by: Mirsad Todorovac <mtodorovac69@yahoo.com>
Link: https://lore.kernel.org/r/20240711182321.963667-1-alan.maguire@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alan Maguire 2024-07-11 19:23:21 +01:00 • committed by Alexei Starovoitov
parent 19d3c179a3
commit b3470da314
1 changed files with 4 additions and 4 deletions
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4
kernel/bpf/btf.c
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@ -7538,7 +7538,7 @@ static void btf_type_show(const struct btf *btf, u32 type_id, void *obj,
btf_type_ops(t)->show(btf, t, type_id, obj, 0, show); btf_type_ops(t)->show(btf, t, type_id, obj, 0, show);
} }
static void btf_seq_show(struct btf_show *show, const char *fmt, __printf(2, 0) static void btf_seq_show(struct btf_show *show, const char *fmt,
va_list args) va_list args)
{ {
seq_vprintf((struct seq_file *)show->target, fmt, args); seq_vprintf((struct seq_file *)show->target, fmt, args);
@ -7572,7 +7572,7 @@ struct btf_show_snprintf {
int len; /* length we would have written */ int len; /* length we would have written */
}; };
static void btf_snprintf_show(struct btf_show *show, const char *fmt, __printf(2, 0) static void btf_snprintf_show(struct btf_show *show, const char *fmt,
va_list args) va_list args)
{ {
struct btf_show_snprintf *ssnprintf = (struct btf_show_snprintf *)show; struct btf_show_snprintf *ssnprintf = (struct btf_show_snprintf *)show;