From: "Jiri Slaby (SUSE)" <jirislaby-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"Jiri Slaby (SUSE)"
<jirislaby-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Martin Liska <mliska-AlSwsSmVLrQ@public.gmane.org>,
Josef Bacik <josef-DigfWCa+lFGyeJad7bwFQA@public.gmane.org>,
Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH v3] block/blk-iocost (gcc13): keep large values in a new enum
Date: Tue, 13 Dec 2022 13:08:26 +0100 [thread overview]
Message-ID: <20221213120826.17446-1-jirislaby@kernel.org> (raw)
Since gcc13, each member of an enum has the same type as the enum [1]. And
that is inherited from its members. Provided:
VTIME_PER_SEC_SHIFT = 37,
VTIME_PER_SEC = 1LLU << VTIME_PER_SEC_SHIFT,
...
AUTOP_CYCLE_NSEC = 10LLU * NSEC_PER_SEC,
the named type is unsigned long.
This generates warnings with gcc-13:
block/blk-iocost.c: In function 'ioc_weight_prfill':
block/blk-iocost.c:3037:37: error: format '%u' expects argument of type 'unsigned int', but argument 4 has type 'long unsigned int'
block/blk-iocost.c: In function 'ioc_weight_show':
block/blk-iocost.c:3047:34: error: format '%u' expects argument of type 'unsigned int', but argument 3 has type 'long unsigned int'
So split the anonumois enum with large values to a separate enum, so
that they don't affect other members.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36113
Cc: Martin Liska <mliska-AlSwsSmVLrQ@public.gmane.org>
Cc: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Josef Bacik <josef-DigfWCa+lFGyeJad7bwFQA@public.gmane.org>
Cc: Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Jiri Slaby (SUSE) <jirislaby-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
Notes:
[v3] move more to a new enum (effectively split the enums)
[v2] move to a new enum
block/blk-iocost.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index d1bdc12deaa7..549ddc9e0c6f 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -232,7 +232,9 @@ enum {
/* 1/64k is granular enough and can easily be handled w/ u32 */
WEIGHT_ONE = 1 << 16,
+};
+enum {
/*
* As vtime is used to calculate the cost of each IO, it needs to
* be fairly high precision. For example, it should be able to
--
2.39.0
next reply other threads:[~2022-12-13 12:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-13 12:08 Jiri Slaby (SUSE) [this message]
[not found] ` <20221213120826.17446-1-jirislaby-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2022-12-14 16:56 ` [PATCH v3] block/blk-iocost (gcc13): keep large values in a new enum Jens Axboe
2022-12-14 16:56 ` Jens Axboe
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