On 11/22/23 2:36 PM, Ben Dooks wrote:
The btf_seq_show() and btf_snprintf_show() take a printk format
string so add a __printf() to these two functions. This fixes the
following extended warnings:
kernel/bpf/btf.c:7094:29: error: function ‘btf_seq_show’ might be a candidate for ‘gnu_printf’ format attribute [-Werror=suggest-attribute=format]
kernel/bpf/btf.c:7131:9: error: function ‘btf_snprintf_show’ might be a candidate for ‘gnu_printf’ format attribute [-Werror=suggest-attribute=format]
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
---
kernel/bpf/btf.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 15d71d2986d3..46c2e87c383d 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -7088,8 +7088,8 @@ 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);
}
-static void btf_seq_show(struct btf_show *show, const char *fmt,
- va_list args)
+static __printf(2,0) void btf_seq_show(struct btf_show *show, const char *fmt,
+ va_list args)
{
seq_vprintf((struct seq_file *)show->target, fmt, args);
}
@@ -7122,7 +7122,7 @@ struct btf_show_snprintf {
int len; /* length we would have written */
};
-static void btf_snprintf_show(struct btf_show *show, const char *fmt,
+static __printf(2,0) void btf_snprintf_show(struct btf_show *show, const char *fmt,
va_list args)
{
Looks good, only small nit is to fix up kernel-style formatting wrt spacing.
struct btf_show_snprintf *ssnprintf = (struct btf_show_snprintf *)show;
