From: Peter Zijlstra <peterz@infradead.org>
To: tglx@linutronix.de, axboe@kernel.dk
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
mingo@redhat.com, dvhart@infradead.org, dave@stgolabs.net,
andrealmeid@igalia.com, Andrew Morton <akpm@linux-foundation.org>,
urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com,
Arnd Bergmann <arnd@arndb.de>,
linux-api@vger.kernel.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, malteskarupke@web.de
Subject: [PATCH v2 07/14] futex: Propagate flags into get_futex_key()
Date: Mon, 07 Aug 2023 14:18:50 +0200 [thread overview]
Message-ID: <20230807123323.228604931@infradead.org> (raw)
In-Reply-To: 20230807121843.710612856@infradead.org
Instead of only passing FLAGS_SHARED as a boolean, pass down flags as
a whole.
No functional change intended.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/futex/core.c | 5 ++++-
kernel/futex/futex.h | 2 +-
kernel/futex/pi.c | 4 ++--
kernel/futex/requeue.c | 6 +++---
kernel/futex/waitwake.c | 14 +++++++-------
5 files changed, 17 insertions(+), 14 deletions(-)
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -217,7 +217,7 @@ static u64 get_inode_sequence_number(str
*
* lock_page() might sleep, the caller should not hold a spinlock.
*/
-int get_futex_key(u32 __user *uaddr, bool fshared, union futex_key *key,
+int get_futex_key(u32 __user *uaddr, unsigned int flags, union futex_key *key,
enum futex_access rw)
{
unsigned long address = (unsigned long)uaddr;
@@ -225,6 +225,9 @@ int get_futex_key(u32 __user *uaddr, boo
struct page *page, *tail;
struct address_space *mapping;
int err, ro = 0;
+ bool fshared;
+
+ fshared = flags & FLAGS_SHARED;
/*
* The futex address must be "naturally" aligned.
--- a/kernel/futex/futex.h
+++ b/kernel/futex/futex.h
@@ -174,7 +174,7 @@ enum futex_access {
FUTEX_WRITE
};
-extern int get_futex_key(u32 __user *uaddr, bool fshared, union futex_key *key,
+extern int get_futex_key(u32 __user *uaddr, unsigned int flags, union futex_key *key,
enum futex_access rw);
extern struct hrtimer_sleeper *
--- a/kernel/futex/pi.c
+++ b/kernel/futex/pi.c
@@ -945,7 +945,7 @@ int futex_lock_pi(u32 __user *uaddr, uns
to = futex_setup_timer(time, &timeout, flags, 0);
retry:
- ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &q.key, FUTEX_WRITE);
+ ret = get_futex_key(uaddr, flags, &q.key, FUTEX_WRITE);
if (unlikely(ret != 0))
goto out;
@@ -1117,7 +1117,7 @@ int futex_unlock_pi(u32 __user *uaddr, u
if ((uval & FUTEX_TID_MASK) != vpid)
return -EPERM;
- ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &key, FUTEX_WRITE);
+ ret = get_futex_key(uaddr, flags, &key, FUTEX_WRITE);
if (ret)
return ret;
--- a/kernel/futex/requeue.c
+++ b/kernel/futex/requeue.c
@@ -424,10 +424,10 @@ int futex_requeue(u32 __user *uaddr1, un
}
retry:
- ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1, FUTEX_READ);
+ ret = get_futex_key(uaddr1, flags, &key1, FUTEX_READ);
if (unlikely(ret != 0))
return ret;
- ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2,
+ ret = get_futex_key(uaddr2, flags, &key2,
requeue_pi ? FUTEX_WRITE : FUTEX_READ);
if (unlikely(ret != 0))
return ret;
@@ -789,7 +789,7 @@ int futex_wait_requeue_pi(u32 __user *ua
*/
rt_mutex_init_waiter(&rt_waiter);
- ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2, FUTEX_WRITE);
+ ret = get_futex_key(uaddr2, flags, &key2, FUTEX_WRITE);
if (unlikely(ret != 0))
goto out;
--- a/kernel/futex/waitwake.c
+++ b/kernel/futex/waitwake.c
@@ -145,13 +145,13 @@ int futex_wake(u32 __user *uaddr, unsign
struct futex_hash_bucket *hb;
struct futex_q *this, *next;
union futex_key key = FUTEX_KEY_INIT;
- int ret;
DEFINE_WAKE_Q(wake_q);
+ int ret;
if (!bitset)
return -EINVAL;
- ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &key, FUTEX_READ);
+ ret = get_futex_key(uaddr, flags, &key, FUTEX_READ);
if (unlikely(ret != 0))
return ret;
@@ -245,10 +245,10 @@ int futex_wake_op(u32 __user *uaddr1, un
DEFINE_WAKE_Q(wake_q);
retry:
- ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1, FUTEX_READ);
+ ret = get_futex_key(uaddr1, flags, &key1, FUTEX_READ);
if (unlikely(ret != 0))
return ret;
- ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2, FUTEX_WRITE);
+ ret = get_futex_key(uaddr2, flags, &key2, FUTEX_WRITE);
if (unlikely(ret != 0))
return ret;
@@ -423,7 +423,7 @@ static int futex_wait_multiple_setup(str
continue;
ret = get_futex_key(u64_to_user_ptr(vs[i].w.uaddr),
- vs[i].w.flags & FLAGS_SHARED,
+ vs[i].w.flags,
&vs[i].q.key, FUTEX_READ);
if (unlikely(ret))
@@ -435,7 +435,7 @@ static int futex_wait_multiple_setup(str
for (i = 0; i < count; i++) {
u32 __user *uaddr = (u32 __user *)(unsigned long)vs[i].w.uaddr;
struct futex_q *q = &vs[i].q;
- u32 val = (u32)vs[i].w.val;
+ u32 val = vs[i].w.val;
hb = futex_q_lock(q);
ret = futex_get_value_locked(&uval, uaddr);
@@ -599,7 +599,7 @@ int futex_wait_setup(u32 __user *uaddr,
* while the syscall executes.
*/
retry:
- ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &q->key, FUTEX_READ);
+ ret = get_futex_key(uaddr, flags, &q->key, FUTEX_READ);
if (unlikely(ret != 0))
return ret;
next prev parent reply other threads:[~2023-08-07 12:37 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-07 12:18 [PATCH v2 00/14] futex: More futex2 bits Peter Zijlstra
2023-08-07 12:18 ` [PATCH v2 01/14] futex: Clarify FUTEX2 flags Peter Zijlstra
2023-08-07 23:51 ` André Almeida
2023-08-07 12:18 ` [PATCH v2 02/14] futex: Extend the " Peter Zijlstra
2023-08-07 18:56 ` Thomas Gleixner
2023-08-08 0:02 ` André Almeida
2023-08-07 12:18 ` [PATCH v2 03/14] futex: Flag conversion Peter Zijlstra
2023-08-07 18:58 ` Thomas Gleixner
2023-08-08 0:52 ` André Almeida
2023-08-07 12:18 ` [PATCH v2 04/14] futex: Validate futex value against futex size Peter Zijlstra
2023-08-07 12:18 ` [PATCH v2 05/14] futex: Add sys_futex_wake() Peter Zijlstra
2023-08-07 19:00 ` Thomas Gleixner
2023-08-09 22:25 ` André Almeida
2023-08-10 12:13 ` Peter Zijlstra
2023-08-10 17:01 ` André Almeida
2023-08-07 12:18 ` [PATCH v2 06/14] futex: Add sys_futex_wait() Peter Zijlstra
2023-08-07 12:18 ` Peter Zijlstra [this message]
2023-08-07 12:18 ` [PATCH v2 08/14] futex: Add flags2 argument to futex_requeue() Peter Zijlstra
2023-08-07 19:01 ` Thomas Gleixner
2023-08-07 12:18 ` [PATCH v2 09/14] futex: Add sys_futex_requeue() Peter Zijlstra
2023-08-07 19:05 ` Thomas Gleixner
2023-08-07 12:18 ` [PATCH v2 10/14] mm: Add vmalloc_huge_node() Peter Zijlstra
2023-08-07 12:18 ` [PATCH v2 11/14] futex: Implement FUTEX2_NUMA Peter Zijlstra
2023-08-07 21:11 ` Thomas Gleixner
2023-08-08 8:54 ` Peter Zijlstra
2023-08-08 9:12 ` Thomas Gleixner
2023-08-07 12:18 ` [PATCH v2 12/14] futex: Propagate flags into futex_get_value_locked() Peter Zijlstra
2023-08-07 21:12 ` Thomas Gleixner
2023-08-07 12:18 ` [PATCH v2 13/14] futex: Enable FUTEX2_{8,16} Peter Zijlstra
2023-08-07 21:15 ` Thomas Gleixner
2023-08-07 12:18 ` [PATCH v2 14/14] futex,selftests: Extend the futex selftests Peter Zijlstra
2023-08-08 20:32 ` [PATCH v2 00/14] futex: More futex2 bits Jens Axboe
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