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From: Ammar Faizi <[email protected]>
To: Jens Axboe <[email protected]>
Cc: Dylan Yudaken <[email protected]>,
	Ammar Faizi <[email protected]>,
	Pavel Begunkov <[email protected]>,
	GNU/Weeb Mailing List <[email protected]>,
	io-uring Mailing List <[email protected]>,
	Facebook Kernel Team <[email protected]>,
	Dylan Yudaken <[email protected]>
Subject: [PATCH liburing v1 1/3] liburing: Clean up `-Wshorten-64-to-32` warnings from clang
Date: Thu, 20 Oct 2022 18:52:04 +0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

From: Dylan Yudaken <[email protected]>

liburing has a couple of int shortening issues found by clang. Clean
them all. This cleanup is particularly useful for build systems that
include these files and run with that error enabled.

Link: https://lore.kernel.org/io-uring/[email protected]
Signed-off-by: Dylan Yudaken <[email protected]>
Co-authored-by: Ammar Faizi <[email protected]>
Signed-off-by: Ammar Faizi <[email protected]>
---
 src/arch/syscall-defs.h |  4 ++--
 src/register.c          |  5 ++++-
 src/setup.c             | 12 ++++++------
 src/syscall.h           |  4 ++--
 4 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/src/arch/syscall-defs.h b/src/arch/syscall-defs.h
index 4afb2af..7660574 100644
--- a/src/arch/syscall-defs.h
+++ b/src/arch/syscall-defs.h
@@ -11,9 +11,9 @@ static inline int __sys_open(const char *pathname, int flags, mode_t mode)
 	 * Some architectures don't have __NR_open, but __NR_openat.
 	 */
 #ifdef __NR_open
-	return __do_syscall3(__NR_open, pathname, flags, mode);
+	return (int)__do_syscall3(__NR_open, pathname, flags, mode);
 #else
-	return __do_syscall4(__NR_openat, AT_FDCWD, pathname, flags, mode);
+	return (int)__do_syscall4(__NR_openat, AT_FDCWD, pathname, flags, mode);
 #endif
 }
 
diff --git a/src/register.c b/src/register.c
index 0a2e5af..912851a 100644
--- a/src/register.c
+++ b/src/register.c
@@ -277,8 +277,11 @@ int io_uring_enable_rings(struct io_uring *ring)
 int io_uring_register_iowq_aff(struct io_uring *ring, size_t cpusz,
 			       const cpu_set_t *mask)
 {
+	if (cpusz >= (1U << 31))
+		return -EINVAL;
+
 	return __sys_io_uring_register(ring->ring_fd, IORING_REGISTER_IOWQ_AFF,
-				       mask, cpusz);
+				mask, (int)cpusz);
 }
 
 int io_uring_unregister_iowq_aff(struct io_uring *ring)
diff --git a/src/setup.c b/src/setup.c
index 21283eb..1885731 100644
--- a/src/setup.c
+++ b/src/setup.c
@@ -248,29 +248,29 @@ __cold void io_uring_free_probe(struct io_uring_probe *probe)
 	uring_free(probe);
 }
 
-static inline int __fls(int x)
+static inline int __fls(unsigned long x)
 {
 	if (!x)
 		return 0;
-	return 8 * sizeof(x) - __builtin_clz(x);
+	return 8 * sizeof(x) - __builtin_clzl(x);
 }
 
 static unsigned roundup_pow2(unsigned depth)
 {
-	return 1UL << __fls(depth - 1);
+	return 1U << __fls(depth - 1);
 }
 
-static size_t npages(size_t size, unsigned page_size)
+static size_t npages(size_t size, long page_size)
 {
 	size--;
 	size /= page_size;
-	return __fls(size);
+	return __fls((int)size);
 }
 
 #define KRING_SIZE	320
 
 static size_t rings_size(struct io_uring_params *p, unsigned entries,
-			 unsigned cq_entries, unsigned page_size)
+			 unsigned cq_entries, long page_size)
 {
 	size_t pages, sq_size, cq_size;
 
diff --git a/src/syscall.h b/src/syscall.h
index f750782..c61d572 100644
--- a/src/syscall.h
+++ b/src/syscall.h
@@ -23,9 +23,9 @@ static inline void *ERR_PTR(intptr_t n)
 	return (void *) n;
 }
 
-static inline intptr_t PTR_ERR(const void *ptr)
+static inline int PTR_ERR(const void *ptr)
 {
-	return (intptr_t) ptr;
+	return (int) (intptr_t)ptr;
 }
 
 static inline bool IS_ERR(const void *ptr)
-- 
Ammar Faizi


  reply	other threads:[~2022-10-20 11:53 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-20 11:52 [PATCH liburing v1 0/3] Clean up clang `-Wshorten-64-to-32` warnings Ammar Faizi
2022-10-20 11:52 ` Ammar Faizi [this message]
2022-10-20 12:12   ` [PATCH liburing v1 1/3] liburing: Clean up `-Wshorten-64-to-32` warnings from clang Ammar Faizi
2022-10-20 12:52     ` Jens Axboe
2022-10-20 11:52 ` [PATCH liburing v1 2/3] Makefile: Introduce `LIBURING_CFLAGS` variable Ammar Faizi
2022-10-20 11:52 ` [PATCH liburing v1 3/3] github: Append `-Wshorten-64-to-32` flag for clang build Ammar Faizi
2022-10-20 12:53 ` [PATCH liburing v1 0/3] Clean up clang `-Wshorten-64-to-32` warnings Dylan Yudaken
2022-10-20 12:57   ` Ammar Faizi

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