* A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
@ 2022-08-13 0:00 Wang Yugui
2022-08-13 0:22 ` Bart Van Assche
0 siblings, 1 reply; 7+ messages in thread
From: Wang Yugui @ 2022-08-13 0:00 UTC (permalink / raw)
To: linux-btrfs, bvanassche
Hi, Bart Van Assche
A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
./include/trace/events/btrfs.h:2327:1: warning: incorrect type in assignment (different base types)
./include/trace/events/btrfs.h:2327:1: expected unsigned char [usertype] opf
./include/trace/events/btrfs.h:2327:1: got restricted blk_opf_t enum req_op
Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/08/13
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
2022-08-13 0:00 A sparse(make C=1) warning in btrfs about the 'blk_opf_t' Wang Yugui
@ 2022-08-13 0:22 ` Bart Van Assche
2022-08-13 1:13 ` Wang Yugui
0 siblings, 1 reply; 7+ messages in thread
From: Bart Van Assche @ 2022-08-13 0:22 UTC (permalink / raw)
To: Wang Yugui, linux-btrfs
On 8/12/22 17:00, Wang Yugui wrote:
> Hi, Bart Van Assche
>
> A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
>
> ./include/trace/events/btrfs.h:2327:1: warning: incorrect type in assignment (different base types)
> ./include/trace/events/btrfs.h:2327:1: expected unsigned char [usertype] opf
> ./include/trace/events/btrfs.h:2327:1: got restricted blk_opf_t enum req_op
Hi Wang,
Please help with verifying whether this patch fixes that warning:
"[PATCH] tracing: Suppress sparse warnings triggered by
is_signed_type()"
(https://lore.kernel.org/all/20220717151047.19220-1-bvanassche@acm.org/).
Thanks,
Bart.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
2022-08-13 0:22 ` Bart Van Assche
@ 2022-08-13 1:13 ` Wang Yugui
2022-08-13 3:02 ` Bart Van Assche
0 siblings, 1 reply; 7+ messages in thread
From: Wang Yugui @ 2022-08-13 1:13 UTC (permalink / raw)
To: Bart Van Assche; +Cc: linux-btrfs
Hi,
> On 8/12/22 17:00, Wang Yugui wrote:
> > Hi, Bart Van Assche
> >
> > A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
> >
> > ./include/trace/events/btrfs.h:2327:1: warning: incorrect type in assignment (different base types)
> > ./include/trace/events/btrfs.h:2327:1: expected unsigned char [usertype] opf
> > ./include/trace/events/btrfs.h:2327:1: got restricted blk_opf_t enum req_op
>
> Hi Wang,
>
> Please help with verifying whether this patch fixes that warning: "[PATCH] tracing: Suppress sparse warnings triggered by is_signed_type()" (https://lore.kernel.org/all/20220717151047.19220-1-bvanassche@acm.org/).
>
> Thanks,
>
> Bart.
This warning is still ON after applied this patch([PATCH] tracing: Suppress sparse warnings triggered by is_signed_type())
Mabye '(different base types)' is a key in this case.
Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/08/13
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
2022-08-13 1:13 ` Wang Yugui
@ 2022-08-13 3:02 ` Bart Van Assche
2022-08-13 4:53 ` Wang Yugui
0 siblings, 1 reply; 7+ messages in thread
From: Bart Van Assche @ 2022-08-13 3:02 UTC (permalink / raw)
To: Wang Yugui; +Cc: linux-btrfs
On 8/12/22 18:13, Wang Yugui wrote:
> This warning is still ON after applied this patch([PATCH] tracing: Suppress sparse warnings triggered by is_signed_type())
How about the patch below?
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 73df80d462dc..925e74356547 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -2338,7 +2338,7 @@ DECLARE_EVENT_CLASS(btrfs_raid56_bio,
__field( u64, devid )
__field( u32, offset )
__field( u32, len )
- __field( u8, opf )
+ __field(enum req_op, opf )
__field( u8, total_stripes )
__field( u8, real_stripes )
__field( u8, nr_data )
Thanks,
Bart.
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
2022-08-13 3:02 ` Bart Van Assche
@ 2022-08-13 4:53 ` Wang Yugui
2022-08-13 15:25 ` Bart Van Assche
0 siblings, 1 reply; 7+ messages in thread
From: Wang Yugui @ 2022-08-13 4:53 UTC (permalink / raw)
To: Bart Van Assche; +Cc: linux-btrfs
Hi,
both '__field(enum req_op,opf)' and '__field(blk_opf_t,opf)' failed to work.
./include/trace/events/btrfs.h:2327:1: warning: incorrect type in assignment (different base types)
./include/trace/events/btrfs.h:2327:1: expected unsigned int [usertype] opf
./include/trace/events/btrfs.h:2327:1: got restricted blk_opf_t enum req_op
/ssd/git/os/linux-5.19/fs/btrfs/super.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/btrfs.h):
./include/trace/events/btrfs.h:2327:1: warning: cast to restricted blk_opf_t
./include/trace/events/btrfs.h:2327:1: warning: cast to restricted blk_opf_t
./include/trace/events/btrfs.h:2327:1: warning: restricted blk_opf_t degrades to integer
./include/trace/events/btrfs.h:2327:1: warning: restricted blk_opf_t degrades to integer
the flowing works, but I'm not confident about it.
./include/linux/blk_types.h:243:typedef __u32 __bitwise blk_opf_t;
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 73df80d462dc..e1f95b061ff1 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -2338,7 +2338,7 @@ DECLARE_EVENT_CLASS(btrfs_raid56_bio,
__field( u64, devid )
__field( u32, offset )
__field( u32, len )
- __field( u8, opf )
+ __field( u32, opf )
__field( u8, total_stripes )
__field( u8, real_stripes )
__field( u8, nr_data )
@@ -2349,7 +2349,7 @@ DECLARE_EVENT_CLASS(btrfs_raid56_bio,
__entry->full_stripe = rbio->bioc->raid_map[0];
__entry->physical = bio->bi_iter.bi_sector << SECTOR_SHIFT;
__entry->len = bio->bi_iter.bi_size;
- __entry->opf = bio_op(bio);
+ __entry->opf = (__force u32)bio_op(bio);
__entry->devid = trace_info->devid;
__entry->offset = trace_info->offset;
__entry->stripe_nr = trace_info->stripe_nr;
Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/08/13
> On 8/12/22 18:13, Wang Yugui wrote:
> > This warning is still ON after applied this patch([PATCH] tracing: Suppress sparse warnings triggered by is_signed_type())
>
> How about the patch below?
>
> diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
> index 73df80d462dc..925e74356547 100644
> --- a/include/trace/events/btrfs.h
> +++ b/include/trace/events/btrfs.h
> @@ -2338,7 +2338,7 @@ DECLARE_EVENT_CLASS(btrfs_raid56_bio,
> __field( u64, devid )
> __field( u32, offset )
> __field( u32, len )
> - __field( u8, opf )
> + __field(enum req_op, opf )
> __field( u8, total_stripes )
> __field( u8, real_stripes )
> __field( u8, nr_data )
>
> Thanks,
>
> Bart.
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
2022-08-13 4:53 ` Wang Yugui
@ 2022-08-13 15:25 ` Bart Van Assche
2022-08-13 16:03 ` Wang Yugui
0 siblings, 1 reply; 7+ messages in thread
From: Bart Van Assche @ 2022-08-13 15:25 UTC (permalink / raw)
To: Wang Yugui; +Cc: linux-btrfs
On 8/12/22 21:53, Wang Yugui wrote:
> both '__field(enum req_op,opf)' and '__field(blk_opf_t,opf)' failed to work.
>
> ./include/trace/events/btrfs.h:2327:1: warning: incorrect type in assignment (different base types)
> ./include/trace/events/btrfs.h:2327:1: expected unsigned int [usertype] opf
> ./include/trace/events/btrfs.h:2327:1: got restricted blk_opf_t enum req_op
>
> /ssd/git/os/linux-5.19/fs/btrfs/super.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/btrfs.h):
> ./include/trace/events/btrfs.h:2327:1: warning: cast to restricted blk_opf_t
> ./include/trace/events/btrfs.h:2327:1: warning: cast to restricted blk_opf_t
> ./include/trace/events/btrfs.h:2327:1: warning: restricted blk_opf_t degrades to integer
> ./include/trace/events/btrfs.h:2327:1: warning: restricted blk_opf_t degrades to integer
From https://en.wikipedia.org/wiki/Posting_style:
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
Regarding the warnings reported above: please apply patch "[PATCH]
tracing: Suppress sparse warnings triggered by is_signed_type()" before
testing my patch.
Thanks,
Bart.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: A sparse(make C=1) warning in btrfs about the 'blk_opf_t'
2022-08-13 15:25 ` Bart Van Assche
@ 2022-08-13 16:03 ` Wang Yugui
0 siblings, 0 replies; 7+ messages in thread
From: Wang Yugui @ 2022-08-13 16:03 UTC (permalink / raw)
To: Bart Van Assche; +Cc: linux-btrfs
Hi,
> On 8/12/22 21:53, Wang Yugui wrote:
> > both '__field(enum req_op,opf)' and '__field(blk_opf_t,opf)' failed to work.
> >
> > ./include/trace/events/btrfs.h:2327:1: warning: incorrect type in assignment (different base types)
> > ./include/trace/events/btrfs.h:2327:1: expected unsigned int [usertype] opf
> > ./include/trace/events/btrfs.h:2327:1: got restricted blk_opf_t enum req_op
> >
> > /ssd/git/os/linux-5.19/fs/btrfs/super.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/btrfs.h):
> > ./include/trace/events/btrfs.h:2327:1: warning: cast to restricted blk_opf_t
> > ./include/trace/events/btrfs.h:2327:1: warning: cast to restricted blk_opf_t
> > ./include/trace/events/btrfs.h:2327:1: warning: restricted blk_opf_t degrades to integer
> > ./include/trace/events/btrfs.h:2327:1: warning: restricted blk_opf_t degrades to integer
>
> From https://en.wikipedia.org/wiki/Posting_style:
>
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?
Thanks for the comment.
> Regarding the warnings reported above: please apply patch "[PATCH] tracing: Suppress sparse warnings triggered by is_signed_type()" before testing my patch.
>
> Thanks,
>
> Bart.
After applied patch "[PATCH] tracing: Suppress sparse warnings triggered
by is_signed_type()", both '__field(enum req_op,opf)' and
'__field(blk_opf_t,opf)' work well without sparse warning(make C=1).
Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/08/13
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-08-13 16:03 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2022-08-13 0:00 A sparse(make C=1) warning in btrfs about the 'blk_opf_t' Wang Yugui
2022-08-13 0:22 ` Bart Van Assche
2022-08-13 1:13 ` Wang Yugui
2022-08-13 3:02 ` Bart Van Assche
2022-08-13 4:53 ` Wang Yugui
2022-08-13 15:25 ` Bart Van Assche
2022-08-13 16:03 ` Wang Yugui
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