Re: [PATCH v1 09/14] futex: Add sys_futex_requeue()
From: Thomas Gleixner <hidden>
Date: 2023-07-31 17:20:45
Also in:
linux-arch, linux-mm, lkml
On Fri, Jul 21 2023 at 12:22, Peter Zijlstra wrote:
+/*
+ * sys_futex_requeue - Requeue a waiter from one futex to another
+ * @waiters: array describing the source and destination futex
+ * @flags: unused
+ * @nr_wake: number of futexes to wake
+ * @nr_requeue: number of futexes to requeue
+ *
+ * Identical to the traditional FUTEX_CMP_REQUEUE op, except it is part of the
+ * futex2 family of calls.
+ */
+
+SYSCALL_DEFINE4(futex_requeue,
+ struct futex_waitv __user *, waiters,
+ unsigned int, flags,
+ int, nr_wake,
+ int, nr_requeue)
+{
+ struct futex_vector futexes[2];
+ u32 cmpval;So this is explictely u32. I'm completely confused vs. the 64 bit futex size variant enablement earlier in the series by now.