[v1] connector: Fix invalid conversion in cn_proc.h

[PATCH] connector: Fix invalid conversion in cn_proc.h

Posted by Matt Jan 1 year, 7 months ago

From: Matt Jan <matt_jan@trendmicro.com>

The implicit conversion from unsigned int to enum
proc_cn_event is invalid, so explicitly cast it
for compilation in a C++ compiler.
/usr/include/linux/cn_proc.h: In function 'proc_cn_event valid_event(proc_cn_event)':
/usr/include/linux/cn_proc.h:72:17: error: invalid conversion from 'unsigned int' to 'proc_cn_event' [-fpermissive]
   72 |         ev_type &= PROC_EVENT_ALL;
      |                 ^
      |                 |
      |                 unsigned int

Signed-off-by: Matt Jan <zoo868e@gmail.com>
---
 include/uapi/linux/cn_proc.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/uapi/linux/cn_proc.h b/include/uapi/linux/cn_proc.h
index f2afb7cc4926..22f9419498ca 100644
--- a/include/uapi/linux/cn_proc.h
+++ b/include/uapi/linux/cn_proc.h
@@ -69,8 +69,7 @@ struct proc_input {
 
 static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type)
 {
-	ev_type &= PROC_EVENT_ALL;
-	return ev_type;
+	return (enum proc_cn_event) (ev_type & PROC_EVENT_ALL);
 }
 
 /*
-- 
2.25.1

Re: [PATCH] connector: Fix invalid conversion in cn_proc.h

Posted by Jakub Kicinski 1 year, 7 months ago

On Fri, 10 May 2024 23:49:19 +0800 Matt Jan wrote:
> From: Matt Jan <matt_jan@trendmicro.com>
> 
> The implicit conversion from unsigned int to enum
> proc_cn_event is invalid, so explicitly cast it
> for compilation in a C++ compiler.
> /usr/include/linux/cn_proc.h: In function 'proc_cn_event valid_event(proc_cn_event)':
> /usr/include/linux/cn_proc.h:72:17: error: invalid conversion from 'unsigned int' to 'proc_cn_event' [-fpermissive]
>    72 |         ev_type &= PROC_EVENT_ALL;
>       |                 ^
>       |                 |
>       |                 unsigned int
> 
> Signed-off-by: Matt Jan <zoo868e@gmail.com>

Why not. But please fix the checkpatch warning:

CHECK: No space is necessary after a cast
#36: FILE: include/uapi/linux/cn_proc.h:72:
+	return (enum proc_cn_event) (ev_type & PROC_EVENT_ALL);
-- 
pw-bot: cr

[PATCH v2] connector: Fix invalid conversion in cn_proc.h

Posted by Matt Jan 1 year, 7 months ago

The implicit conversion from unsigned int to enum
proc_cn_event is invalid, so explicitly cast it
for compilation in a C++ compiler.
/usr/include/linux/cn_proc.h: In function 'proc_cn_event valid_event(proc_cn_event)':
/usr/include/linux/cn_proc.h:72:17: error: invalid conversion from 'unsigned int' to 'proc_cn_event' [-fpermissive]
   72 |         ev_type &= PROC_EVENT_ALL;
      |                 ^
      |                 |
      |                 unsigned int

Signed-off-by: Matt Jan <zoo868e@gmail.com>
---
change in v2:
	fix: remove space after cast

 include/uapi/linux/cn_proc.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/uapi/linux/cn_proc.h b/include/uapi/linux/cn_proc.h
index f2afb7cc4926..18e3745b86cd 100644
--- a/include/uapi/linux/cn_proc.h
+++ b/include/uapi/linux/cn_proc.h
@@ -69,8 +69,7 @@ struct proc_input {
 
 static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type)
 {
-	ev_type &= PROC_EVENT_ALL;
-	return ev_type;
+	return (enum proc_cn_event)(ev_type & PROC_EVENT_ALL);
 }
 
 /*
-- 
2.25.1