Re: [PATCH] sctp: chunk.c: correct format string for size_t in printk
From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Date: 2019-02-28 13:55:42
Also in:
linux-sctp, lkml
On Thu, Feb 28, 2019 at 11:36:52AM +0000, Matthias Maennich wrote:
According to Documentation/core-api/printk-formats.rst, size_t should be
printed with %zu, rather than %Zu.
In addition, using %Zu triggers a warning on clang (-Wformat-extra-args):
net/sctp/chunk.c:196:25: warning: data argument not used by format string [-Wformat-extra-args]
__func__, asoc, max_data);
~~~~~~~~~~~~~~~~^~~~~~~~~
./include/linux/printk.h:440:49: note: expanded from macro 'pr_warn_ratelimited'
printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
./include/linux/printk.h:424:17: note: expanded from macro 'printk_ratelimited'
printk(fmt, ##__VA_ARGS__); \
~~~ ^
Fixes: 5b5e0928f742 ("lib/vsprintf.c: remove %Z support")
Link: https://github.com/ClangBuiltLinux/linux/issues/378
Signed-off-by: Matthias Maennich <maennich@google.com>Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
quoted hunk ↗ jump to hunk
--- net/sctp/chunk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c index 64bef313d436..5cb7c1ff97e9 100644 --- a/net/sctp/chunk.c +++ b/net/sctp/chunk.c@@ -192,7 +192,7 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, if (unlikely(!max_data)) { max_data = sctp_min_frag_point(sctp_sk(asoc->base.sk), sctp_datachk_len(&asoc->stream)); - pr_warn_ratelimited("%s: asoc:%p frag_point is zero, forcing max_data to default minimum (%Zu)", + pr_warn_ratelimited("%s: asoc:%p frag_point is zero, forcing max_data to default minimum (%zu)", __func__, asoc, max_data); }-- 2.21.0.rc2.261.ga7da99ff1b-goog