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[COMMITTED PATCH] Add priority inheritance futex support on sparc.
- From: David Miller <davem at davemloft dot net>
- To: libc-alpha at sourceware dot org
- Cc: siddhesh at redhat dot com
- Date: Thu, 21 Feb 2013 18:21:48 -0500 (EST)
- Subject: [COMMITTED PATCH] Add priority inheritance futex support on sparc.
Siddhesh, thanks for laying the foundation in the generic code
and posting that note here for arch maintainers, it helps a lot.
* sysdeps/unix/sysv/linux/sparc/lowlevellock.h
(FUTEX_WAIT_REQUEUE_PI): Define.
(FUTEX_CMP_REQUEUE_PI): Likewise.
(lll_futex_wait_requeue_pi): Likewise.
(lll_futex_timed_wait_requeue_pi): Likewise.
(lll_futex_cmp_requeue_pi): Likewise.
---
nptl/ChangeLog | 9 +++++++
nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h | 30 +++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 5f591b0..2a67608 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,12 @@
+2013-02-21 David S. Miller <davem@davemloft.net>
+
+ * sysdeps/unix/sysv/linux/sparc/lowlevellock.h
+ (FUTEX_WAIT_REQUEUE_PI): Define.
+ (FUTEX_CMP_REQUEUE_PI): Likewise.
+ (lll_futex_wait_requeue_pi): Likewise.
+ (lll_futex_timed_wait_requeue_pi): Likewise.
+ (lll_futex_cmp_requeue_pi): Likewise.
+
2013-02-21 Carlos O'Donell <carlos@redhat.com>
* sysdeps/unix/sysv/linux/fork.c: Fix comment typo.
diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
index c88ec16..2d7d9f8 100644
--- a/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
@@ -37,6 +37,8 @@
#define FUTEX_TRYLOCK_PI 8
#define FUTEX_WAIT_BITSET 9
#define FUTEX_WAKE_BITSET 10
+#define FUTEX_WAIT_REQUEUE_PI 11
+#define FUTEX_CMP_REQUEUE_PI 12
#define FUTEX_PRIVATE_FLAG 128
#define FUTEX_CLOCK_REALTIME 256
@@ -157,6 +159,34 @@ extern void __cpu_relax (void);
})
#endif
+/* Priority Inheritance support. */
+#define lll_futex_wait_requeue_pi(futexp, val, mutex, private) \
+ lll_futex_timed_wait_requeue_pi (futexp, val, NULL, 0, mutex, private)
+
+#define lll_futex_timed_wait_requeue_pi(futexp, val, timespec, clockbit, \
+ mutex, private) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ int __op = FUTEX_WAIT_REQUEUE_PI | clockbit; \
+ \
+ __ret = INTERNAL_SYSCALL (futex, __err, 5, (futexp), \
+ __lll_private_flag (__op, private), \
+ (val), (timespec), mutex); \
+ INTERNAL_SYSCALL_ERROR_P (__ret, __err) ? -__ret : __ret; \
+ })
+
+#define lll_futex_cmp_requeue_pi(futexp, nr_wake, nr_move, mutex, val, priv) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ \
+ __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
+ __lll_private_flag (FUTEX_CMP_REQUEUE_PI, priv),\
+ (nr_wake), (nr_move), (mutex), (val)); \
+ INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
+ })
+
static inline int
__attribute__ ((always_inline))
__lll_trylock (int *futex)
--
1.8.1.2