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bootconfig: Rename xbc_node_find_child() to xbc_node_find_subkey()

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Rename xbc_node_find_child() to xbc_node_find_subkey() for
clarifying that function returns a key node (no value node).
Since there are xbc_node_for_each_child() (loop on all child
nodes) and xbc_node_for_each_subkey() (loop on only subkey
nodes), this name distinction is necessary to avoid confusing
users.

Link: https://lkml.kernel.org/r/163119459826.161018.11200274779483115300.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2021-09-09 22:36:38 +09:00 committed by Steven Rostedt (VMware)
parent 5f8895b27d
commit 5dfe50b055
3 changed files with 18 additions and 18 deletions
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4
include/linux/bootconfig.h
View file

@ -110,7 +110,7 @@ static inline __init bool xbc_node_is_leaf(struct xbc_node *node)
}
/* Tree-based key-value access APIs */
struct xbc_node * __init xbc_node_find_child(struct xbc_node *parent,
struct xbc_node * __init xbc_node_find_subkey(struct xbc_node *parent,
const char *key);
const char * __init xbc_node_find_value(struct xbc_node *parent,
@ -148,7 +148,7 @@ xbc_find_value(const char *key, struct xbc_node **vnode)
*/
static inline struct xbc_node * __init xbc_find_node(const char *key)
{
return xbc_node_find_child(NULL, key);
return xbc_node_find_subkey(NULL, key);
}
/**

24
kernel/trace/trace_boot.c
View file

@ -262,9 +262,9 @@ trace_boot_hist_add_one_handler(struct xbc_node *hnode, char **bufp,
append_printf(bufp, end, ":%s(%s)", handler, p);
/* Compose 'action' parameter */
knode = xbc_node_find_child(hnode, "trace");
knode = xbc_node_find_subkey(hnode, "trace");
if (!knode)
knode = xbc_node_find_child(hnode, "save");
knode = xbc_node_find_subkey(hnode, "save");
if (knode) {
anode = xbc_node_get_child(knode);
@ -283,7 +283,7 @@ trace_boot_hist_add_one_handler(struct xbc_node *hnode, char **bufp,
sep = ',';
}
append_printf(bufp, end, ")");
} else if (xbc_node_find_child(hnode, "snapshot")) {
} else if (xbc_node_find_subkey(hnode, "snapshot")) {
append_printf(bufp, end, ".snapshot()");
} else {
pr_err("hist.%s requires an action.\n",
@ -314,7 +314,7 @@ trace_boot_hist_add_handlers(struct xbc_node *hnode, char **bufp,
break;
}
if (xbc_node_find_child(hnode, param))
if (xbc_node_find_subkey(hnode, param))
ret = trace_boot_hist_add_one_handler(hnode, bufp, end, handler, param);
return ret;
@ -374,7 +374,7 @@ trace_boot_compose_hist_cmd(struct xbc_node *hnode, char *buf, size_t size)
if (p)
append_printf(&buf, end, ":name=%s", p);
node = xbc_node_find_child(hnode, "var");
node = xbc_node_find_subkey(hnode, "var");
if (node) {
xbc_node_for_each_key_value(node, knode, p) {
/* Expression must not include spaces. */
@ -393,13 +393,13 @@ trace_boot_compose_hist_cmd(struct xbc_node *hnode, char *buf, size_t size)
append_printf(&buf, end, ":clear");
/* Histogram handler and actions */
node = xbc_node_find_child(hnode, "onmax");
node = xbc_node_find_subkey(hnode, "onmax");
if (node && trace_boot_hist_add_handlers(node, &buf, end, "var") < 0)
return -EINVAL;
node = xbc_node_find_child(hnode, "onchange");
node = xbc_node_find_subkey(hnode, "onchange");
if (node && trace_boot_hist_add_handlers(node, &buf, end, "var") < 0)
return -EINVAL;
node = xbc_node_find_child(hnode, "onmatch");
node = xbc_node_find_subkey(hnode, "onmatch");
if (node && trace_boot_hist_add_handlers(node, &buf, end, "event") < 0)
return -EINVAL;
@ -436,7 +436,7 @@ trace_boot_init_histograms(struct trace_event_file *file,
}
}
if (xbc_node_find_child(hnode, "keys")) {
if (xbc_node_find_subkey(hnode, "keys")) {
if (trace_boot_compose_hist_cmd(hnode, buf, size) == 0) {
tmp = kstrdup(buf, GFP_KERNEL);
if (trigger_process_regex(file, buf) < 0)
@ -495,7 +495,7 @@ trace_boot_init_one_event(struct trace_array *tr, struct xbc_node *gnode,
else if (trigger_process_regex(file, buf) < 0)
pr_err("Failed to apply an action: %s\n", p);
}
anode = xbc_node_find_child(enode, "hist");
anode = xbc_node_find_subkey(enode, "hist");
if (anode)
trace_boot_init_histograms(file, anode, buf, ARRAY_SIZE(buf));
} else if (xbc_node_find_value(enode, "actions", NULL))
@ -517,7 +517,7 @@ trace_boot_init_events(struct trace_array *tr, struct xbc_node *node)
bool enable, enable_all = false;
const char *data;
node = xbc_node_find_child(node, "event");
node = xbc_node_find_subkey(node, "event");
if (!node)
return;
/* per-event key starts with "event.GROUP.EVENT" */
@ -620,7 +620,7 @@ trace_boot_init_instances(struct xbc_node *node)
struct trace_array *tr;
const char *p;
node = xbc_node_find_child(node, "instance");
node = xbc_node_find_subkey(node, "instance");
if (!node)
return;

8
lib/bootconfig.c
View file

@ -142,16 +142,16 @@ xbc_node_match_prefix(struct xbc_node *node, const char **prefix)
}
/**
* xbc_node_find_child() - Find a child node which matches given key
* xbc_node_find_subkey() - Find a subkey node which matches given key
* @parent: An XBC node.
* @key: A key string.
*
* Search a node under @parent which matches @key. The @key can contain
* Search a key node under @parent which matches @key. The @key can contain
* several words jointed with '.'. If @parent is NULL, this searches the
* node from whole tree. Return NULL if no node is matched.
*/
struct xbc_node * __init
xbc_node_find_child(struct xbc_node *parent, const char *key)
xbc_node_find_subkey(struct xbc_node *parent, const char *key)
{
struct xbc_node *node;
@ -191,7 +191,7 @@ const char * __init
xbc_node_find_value(struct xbc_node *parent, const char *key,
struct xbc_node **vnode)
{
struct xbc_node *node = xbc_node_find_child(parent, key);
struct xbc_node *node = xbc_node_find_subkey(parent, key);
if (!node || !xbc_node_is_key(node))
return NULL;