linux-kernel - [PATCH 1/3] kmod: Bunch of internal functions renames

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Date:	Mon,  6 Jul 2015 17:33:39 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 1/3] kmod: Bunch of internal functions renames

Underscores on function names aren't much verbose to explain the
purpose of a function. And kmod has interesting such flavours.

Lets rename the following functions:

* __call_usermodehelper -> call_usermodehelper_exec_work
* ____call_usermodehelper -> call_usermodehelper_exec_async
* wait_for_helper -> call_usermodehelper_exec_sync

Cc: Rik van Riel <riel@...hat.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Christoph Lameter <cl@...ux.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 kernel/kmod.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/kernel/kmod.c b/kernel/kmod.c
index 2777f40..4682e91 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -213,7 +213,7 @@ static void umh_complete(struct subprocess_info *sub_info)
 /*
  * This is the task which runs the usermode application
  */
-static int ____call_usermodehelper(void *data)
+static int call_usermodehelper_exec_async(void *data)
 {
 	struct subprocess_info *sub_info = data;
 	struct cred *new;
@@ -258,7 +258,10 @@ static int ____call_usermodehelper(void *data)
 			   (const char __user *const __user *)sub_info->envp);
 out:
 	sub_info->retval = retval;
-	/* wait_for_helper() will call umh_complete if UHM_WAIT_PROC. */
+	/*
+	 * call_usermodehelper_exec_sync() will call umh_complete
+	 * if UHM_WAIT_PROC.
+	 */
 	if (!(sub_info->wait & UMH_WAIT_PROC))
 		umh_complete(sub_info);
 	if (!retval)
@@ -267,14 +270,14 @@ out:
 }
 
 /* Keventd can't block, but this (a child) can. */
-static int wait_for_helper(void *data)
+static int call_usermodehelper_exec_sync(void *data)
 {
 	struct subprocess_info *sub_info = data;
 	pid_t pid;
 
 	/* If SIGCLD is ignored sys_wait4 won't populate the status. */
 	kernel_sigaction(SIGCHLD, SIG_DFL);
-	pid = kernel_thread(____call_usermodehelper, sub_info, SIGCHLD);
+	pid = kernel_thread(call_usermodehelper_exec_async, sub_info, SIGCHLD);
 	if (pid < 0) {
 		sub_info->retval = pid;
 	} else {
@@ -282,17 +285,18 @@ static int wait_for_helper(void *data)
 		/*
 		 * Normally it is bogus to call wait4() from in-kernel because
 		 * wait4() wants to write the exit code to a userspace address.
-		 * But wait_for_helper() always runs as keventd, and put_user()
-		 * to a kernel address works OK for kernel threads, due to their
-		 * having an mm_segment_t which spans the entire address space.
+		 * But call_usermodehelper_exec_sync() always runs as keventd,
+		 * and put_user() to a kernel address works OK for kernel
+		 * threads, due to their having an mm_segment_t which spans the
+		 * entire address space.
 		 *
 		 * Thus the __user pointer cast is valid here.
 		 */
 		sys_wait4(pid, (int __user *)&ret, 0, NULL);
 
 		/*
-		 * If ret is 0, either ____call_usermodehelper failed and the
-		 * real error code is already in sub_info->retval or
+		 * If ret is 0, either call_usermodehelper_exec_async failed and
+		 * the real error code is already in sub_info->retval or
 		 * sub_info->retval is 0 anyway, so don't mess with it then.
 		 */
 		if (ret)
@@ -304,17 +308,17 @@ static int wait_for_helper(void *data)
 }
 
 /* This is run by khelper thread  */
-static void __call_usermodehelper(struct work_struct *work)
+static void call_usermodehelper_exec_work(struct work_struct *work)
 {
 	struct subprocess_info *sub_info =
 		container_of(work, struct subprocess_info, work);
 	pid_t pid;
 
 	if (sub_info->wait & UMH_WAIT_PROC)
-		pid = kernel_thread(wait_for_helper, sub_info,
+		pid = kernel_thread(call_usermodehelper_exec_sync, sub_info,
 				    CLONE_FS | CLONE_FILES | SIGCHLD);
 	else
-		pid = kernel_thread(____call_usermodehelper, sub_info,
+		pid = kernel_thread(call_usermodehelper_exec_async, sub_info,
 				    SIGCHLD);
 
 	if (pid < 0) {
@@ -509,7 +513,7 @@ struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
 	if (!sub_info)
 		goto out;
 
-	INIT_WORK(&sub_info->work, __call_usermodehelper);
+	INIT_WORK(&sub_info->work, call_usermodehelper_exec_work);
 	sub_info->path = path;
 	sub_info->argv = argv;
 	sub_info->envp = envp;
-- 
2.1.4

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