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authorThomas Gleixner <tglx@linutronix.de>2019-08-21 22:09:04 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-08-28 12:50:33 +0300
commit2b69942f9021bf75bd1b001f53bd2578361fadf3 (patch)
tree1d51a30bd34edc3c0a723a306199b1018e404db3 /include/linux/posix-timers.h
parentab693c5a5e3107f035d5162e6ada9aaf7dd76a1d (diff)
downloadlinux-2b69942f9021bf75bd1b001f53bd2578361fadf3.tar.xz
posix-cpu-timers: Create a container struct
Per task/process data of posix CPU timers is all over the place which makes the code hard to follow and requires ifdeffery. Create a container to hold all this information in one place, so data is consolidated and the ifdeffery can be confined to the posix timer header file and removed from places like fork. As a first step, move the cpu_timers list head array into the new struct and clean up the initializers and simplify fork. The remaining #ifdef in fork will be removed later. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lkml.kernel.org/r/20190821192920.819418976@linutronix.de
Diffstat (limited to 'include/linux/posix-timers.h')
-rw-r--r--include/linux/posix-timers.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 033374b99767..cdef89750b2c 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -62,6 +62,40 @@ static inline int clockid_to_fd(const clockid_t clk)
return ~(clk >> 3);
}
+#ifdef CONFIG_POSIX_TIMERS
+/**
+ * posix_cputimers - Container for posix CPU timer related data
+ * @cpu_timers: List heads to queue posix CPU timers
+ *
+ * Used in task_struct and signal_struct
+ */
+struct posix_cputimers {
+ struct list_head cpu_timers[CPUCLOCK_MAX];
+};
+
+static inline void posix_cputimers_init(struct posix_cputimers *pct)
+{
+ INIT_LIST_HEAD(&pct->cpu_timers[0]);
+ INIT_LIST_HEAD(&pct->cpu_timers[1]);
+ INIT_LIST_HEAD(&pct->cpu_timers[2]);
+}
+
+/* Init task static initializer */
+#define INIT_CPU_TIMERLISTS(c) { \
+ LIST_HEAD_INIT(c.cpu_timers[0]), \
+ LIST_HEAD_INIT(c.cpu_timers[1]), \
+ LIST_HEAD_INIT(c.cpu_timers[2]), \
+}
+
+#define INIT_CPU_TIMERS(s) \
+ .posix_cputimers = { \
+ .cpu_timers = INIT_CPU_TIMERLISTS(s.posix_cputimers), \
+ },
+#else
+struct posix_cputimers { };
+#define INIT_CPU_TIMERS(s)
+#endif
+
#define REQUEUE_PENDING 1
/**