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rcu: Move gp_state_names[] and gp_state_getname() to tree_stall.h 

Only tree_stall.h needs to get name from GP state, so this commit
moves the gp_state_names[] array and the gp_state_getname()
from kernel/rcu/tree.h and kernel/rcu/tree.c, respectively, to
kernel/rcu/tree_stall.h.  While moving gp_state_names[], this commit
uses the GCC syntax to ensure that the right string is associated with
the right CPP macro.

Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Lai Jiangshan 2019-10-15 10:28:47 +00:00 committed by Paul E. McKenney
parent 4778339df0
commit e2167b38c8
3 changed files with 22 additions and 22 deletions
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10
kernel/rcu/tree.c
View File

@ -528,16 +528,6 @@ static struct rcu_node *rcu_get_root(void)
return &rcu_state.node[0];
}
/*
* Convert a ->gp_state value to a character string.
*/
static const char *gp_state_getname(short gs)
{
if (gs < 0 || gs >= ARRAY_SIZE(gp_state_names))
return "???";
return gp_state_names[gs];
}
/*
* Send along grace-period-related data for rcutorture diagnostics.
*/

12
kernel/rcu/tree.h
View File

@ -368,18 +368,6 @@ struct rcu_state {
#define RCU_GP_CLEANUP 7 /* Grace-period cleanup started. */
#define RCU_GP_CLEANED 8 /* Grace-period cleanup complete. */
static const char * const gp_state_names[] = {
"RCU_GP_IDLE",
"RCU_GP_WAIT_GPS",
"RCU_GP_DONE_GPS",
"RCU_GP_ONOFF",
"RCU_GP_INIT",
"RCU_GP_WAIT_FQS",
"RCU_GP_DOING_FQS",
"RCU_GP_CLEANUP",
"RCU_GP_CLEANED",
};
/*
* In order to export the rcu_state name to the tracing tools, it
* needs to be added in the __tracepoint_string section.

22
kernel/rcu/tree_stall.h
View File

@ -279,6 +279,28 @@ static void print_cpu_stall_fast_no_hz(char *cp, int cpu)
#endif /* #else #ifdef CONFIG_RCU_FAST_NO_HZ */
static const char * const gp_state_names[] = {
[RCU_GP_IDLE] = "RCU_GP_IDLE",
[RCU_GP_WAIT_GPS] = "RCU_GP_WAIT_GPS",
[RCU_GP_DONE_GPS] = "RCU_GP_DONE_GPS",
[RCU_GP_ONOFF] = "RCU_GP_ONOFF",
[RCU_GP_INIT] = "RCU_GP_INIT",
[RCU_GP_WAIT_FQS] = "RCU_GP_WAIT_FQS",
[RCU_GP_DOING_FQS] = "RCU_GP_DOING_FQS",
[RCU_GP_CLEANUP] = "RCU_GP_CLEANUP",
[RCU_GP_CLEANED] = "RCU_GP_CLEANED",
};
/*
* Convert a ->gp_state value to a character string.
*/
static const char *gp_state_getname(short gs)
{
if (gs < 0 || gs >= ARRAY_SIZE(gp_state_names))
return "???";
return gp_state_names[gs];
}
/*
* Print out diagnostic information for the specified stalled CPU.
*