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authorIngo Molnar <mingo@kernel.org>2016-03-15 11:00:12 +0300
committerIngo Molnar <mingo@kernel.org>2016-03-15 11:01:06 +0300
commit8bc6782fe20bd2584c73a35c47329c9fd0a8d34c (patch)
treec7fc6f467ee212e4ef442e70843c48fcf3c67c17 /include
parente23604edac2a7be6a8808a5d13fac6b9df4eb9a8 (diff)
parent3500efae4410454522697c94c23fc40323c0cee9 (diff)
downloadlinux-8bc6782fe20bd2584c73a35c47329c9fd0a8d34c.tar.xz
Merge commit 'fixes.2015.02.23a' into core/rcu
Conflicts: kernel/rcu/tree.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/compiler.h12
-rw-r--r--include/linux/irq.h6
-rw-r--r--include/linux/rcupdate.h2
-rw-r--r--include/linux/srcu.h19
4 files changed, 29 insertions, 10 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index a27f4f17c382..b5ff9881bef8 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -20,12 +20,14 @@
# define __pmem __attribute__((noderef, address_space(5)))
#ifdef CONFIG_SPARSE_RCU_POINTER
# define __rcu __attribute__((noderef, address_space(4)))
-#else
+#else /* CONFIG_SPARSE_RCU_POINTER */
# define __rcu
-#endif
+#endif /* CONFIG_SPARSE_RCU_POINTER */
+# define __private __attribute__((noderef))
extern void __chk_user_ptr(const volatile void __user *);
extern void __chk_io_ptr(const volatile void __iomem *);
-#else
+# define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member))
+#else /* __CHECKER__ */
# define __user
# define __kernel
# define __safe
@@ -44,7 +46,9 @@ extern void __chk_io_ptr(const volatile void __iomem *);
# define __percpu
# define __rcu
# define __pmem
-#endif
+# define __private
+# define ACCESS_PRIVATE(p, member) ((p)->member)
+#endif /* __CHECKER__ */
/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
#define ___PASTE(a,b) a##b
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 3c1c96786248..cd14cd4a22b4 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -137,7 +137,7 @@ struct irq_domain;
* @msi_desc: MSI descriptor
*/
struct irq_common_data {
- unsigned int state_use_accessors;
+ unsigned int __private state_use_accessors;
#ifdef CONFIG_NUMA
unsigned int node;
#endif
@@ -208,7 +208,7 @@ enum {
IRQD_FORWARDED_TO_VCPU = (1 << 20),
};
-#define __irqd_to_state(d) ((d)->common->state_use_accessors)
+#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
{
@@ -299,6 +299,8 @@ static inline void irqd_clr_forwarded_to_vcpu(struct irq_data *d)
__irqd_to_state(d) &= ~IRQD_FORWARDED_TO_VCPU;
}
+#undef __irqd_to_state
+
static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
{
return d->hwirq;
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 14e6f47ee16f..b5d48bd56e3f 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -360,8 +360,6 @@ void rcu_user_exit(void);
#else
static inline void rcu_user_enter(void) { }
static inline void rcu_user_exit(void) { }
-static inline void rcu_user_hooks_switch(struct task_struct *prev,
- struct task_struct *next) { }
#endif /* CONFIG_NO_HZ_FULL */
#ifdef CONFIG_RCU_NOCB_CPU
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index f5f80c5643ac..dc8eb63c6568 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -99,8 +99,23 @@ void process_srcu(struct work_struct *work);
}
/*
- * define and init a srcu struct at build time.
- * dont't call init_srcu_struct() nor cleanup_srcu_struct() on it.
+ * Define and initialize a srcu struct at build time.
+ * Do -not- call init_srcu_struct() nor cleanup_srcu_struct() on it.
+ *
+ * Note that although DEFINE_STATIC_SRCU() hides the name from other
+ * files, the per-CPU variable rules nevertheless require that the
+ * chosen name be globally unique. These rules also prohibit use of
+ * DEFINE_STATIC_SRCU() within a function. If these rules are too
+ * restrictive, declare the srcu_struct manually. For example, in
+ * each file:
+ *
+ * static struct srcu_struct my_srcu;
+ *
+ * Then, before the first use of each my_srcu, manually initialize it:
+ *
+ * init_srcu_struct(&my_srcu);
+ *
+ * See include/linux/percpu-defs.h for the rules on per-CPU variables.
*/
#define __DEFINE_SRCU(name, is_static) \
static DEFINE_PER_CPU(struct srcu_struct_array, name##_srcu_array);\