The following commit has been merged into the locking/core branch of tip:
Commit-ID: 2f3cc106873cb8234300c381a96b0b0e4ba63ab9
Gitweb: https://git.kernel.org/tip/2f3cc106873cb8234300c381a96b0b0e4ba63ab9
Author: André Almeida <andrealmeid@xxxxxxxxxxxxx>
AuthorDate: Thu, 02 Jul 2020 17:28:43 -03:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Fri, 17 Jul 2020 23:58:50 +02:00
futex: Consistently use fshared as boolean
Since fshared is only conveying true/false values, declare it as bool.
In get_futex_key() the usage of fshared can be restricted to the first part
of the function. If fshared is false the function is terminated early and
the subsequent code can use a constant 'true' instead of the variable.
Signed-off-by: André Almeida <andrealmeid@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200702202843.520764-5-andrealmeid@xxxxxxxxxxxxx
---
kernel/futex.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/futex.c b/kernel/futex.c
index 697835a..f483bc5 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -458,7 +458,7 @@ static u64 get_inode_sequence_number(struct inode *inode)
/**
* get_futex_key() - Get parameters which are the keys for a futex
* @uaddr: virtual address of the futex
- * @fshared: 0 for a PROCESS_PRIVATE futex, 1 for PROCESS_SHARED
+ * @fshared: false for a PROCESS_PRIVATE futex, true for PROCESS_SHARED
* @key: address where result is stored.
* @rw: mapping needs to be read/write (values: FUTEX_READ,
* FUTEX_WRITE)
@@ -482,8 +482,8 @@ static u64 get_inode_sequence_number(struct inode *inode)
*
* lock_page() might sleep, the caller should not hold a spinlock.
*/
-static int
-get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_access rw)
+static int get_futex_key(u32 __user *uaddr, bool fshared, union futex_key *key,
+ enum futex_access rw)
{
unsigned long address = (unsigned long)uaddr;
struct mm_struct *mm = current->mm;
@@ -520,7 +520,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
again:
/* Ignore any VERIFY_READ mapping (futex common case) */
- if (unlikely(should_fail_futex(fshared)))
+ if (unlikely(should_fail_futex(true)))
return -EFAULT;
err = get_user_pages_fast(address, 1, FOLL_WRITE, &page);
@@ -608,7 +608,7 @@ again:
* A RO anonymous page will never change and thus doesn't make
* sense for futex operations.
*/
- if (unlikely(should_fail_futex(fshared)) || ro) {
+ if (unlikely(should_fail_futex(true)) || ro) {
err = -EFAULT;
goto out;
}
|