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ftrace: Convert "inc" parameter to bool in ftrace_hash_rec_update_modify()

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The parameter "inc" in the function ftrace_hash_rec_update_modify() is
boolean. Change it to be such.

Also add documentation to what the function does.

Link: https://lore.kernel.org/linux-trace-kernel/20240605180409.021080462@goodmis.org

Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Google) 2024-06-05 14:03:38 -04:00
parent da73f6d490
commit 1a88c07167
1 changed files with 20 additions and 3 deletions
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23
kernel/trace/ftrace.c
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@ -1883,7 +1883,24 @@ static bool ftrace_hash_rec_enable(struct ftrace_ops *ops)
return __ftrace_hash_rec_update(ops, true);
}
static void ftrace_hash_rec_update_modify(struct ftrace_ops *ops, int inc)
/*
* This function will update what functions @ops traces when its filter
* changes.
*
* The @inc states if the @ops callbacks are going to be added or removed.
* When one of the @ops hashes are updated to a "new_hash" the dyn_ftrace
* records are update via:
*
* ftrace_hash_rec_disable_modify(ops);
* ops->hash = new_hash
* ftrace_hash_rec_enable_modify(ops);
*
* Where the @ops is removed from all the records it is tracing using
* its old hash. The @ops hash is updated to the new hash, and then
* the @ops is added back to the records so that it is tracing all
* the new functions.
*/
static void ftrace_hash_rec_update_modify(struct ftrace_ops *ops, bool inc)
{
struct ftrace_ops *op;
@ -1907,12 +1924,12 @@ static void ftrace_hash_rec_update_modify(struct ftrace_ops *ops, int inc)
static void ftrace_hash_rec_disable_modify(struct ftrace_ops *ops)
{
ftrace_hash_rec_update_modify(ops, 0);
ftrace_hash_rec_update_modify(ops, false);
}
static void ftrace_hash_rec_enable_modify(struct ftrace_ops *ops)
{
ftrace_hash_rec_update_modify(ops, 1);
ftrace_hash_rec_update_modify(ops, true);
}
/*