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Date: Wed, 5 Feb 2020 20:57:10 -0800
From: Randy Dunlap <rdunlap@...radead.org>
To: LKML <linux-kernel@...r.kernel.org>, axboe <axboe@...nel.dk>,
io-uring@...r.kernel.org
Subject: [PATCH] io_uring: fix 1-bit bitfields to be unsigned
From: Randy Dunlap <rdunlap@...radead.org>
Make bitfields of size 1 bit be unsigned (since there is no room
for the sign bit).
This clears up the sparse warnings:
CHECK ../fs/io_uring.c
../fs/io_uring.c:207:50: error: dubious one-bit signed bitfield
../fs/io_uring.c:208:55: error: dubious one-bit signed bitfield
../fs/io_uring.c:209:63: error: dubious one-bit signed bitfield
../fs/io_uring.c:210:54: error: dubious one-bit signed bitfield
../fs/io_uring.c:211:57: error: dubious one-bit signed bitfield
Found by sight and then verified with sparse.
Fixes: 69b3e546139a ("io_uring: change io_ring_ctx bool fields into bit fields")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: io-uring@...r.kernel.org
---
fs/io_uring.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- linux-next-20200205.orig/fs/io_uring.c
+++ linux-next-20200205/fs/io_uring.c
@@ -204,11 +204,11 @@ struct io_ring_ctx {
struct {
unsigned int flags;
- int compat: 1;
- int account_mem: 1;
- int cq_overflow_flushed: 1;
- int drain_next: 1;
- int eventfd_async: 1;
+ unsigned int compat: 1;
+ unsigned int account_mem: 1;
+ unsigned int cq_overflow_flushed: 1;
+ unsigned int drain_next: 1;
+ unsigned int eventfd_async: 1;
/*
* Ring buffer of indices into array of io_uring_sqe, which is
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