fuse: convert printk -> pr_*

Functions, like pr_err, are a more modern variant of printing compared to
printk. They could be used to denoise sources by using needed level in
the print function name, and by automatically inserting per-driver /
function / ... print prefix as defined by pr_fmt macro. pr_* are also
said to be used in Documentation/process/coding-style.rst and more
recent code - for example overlayfs - uses them instead of printk.

Convert CUSE and FUSE to use the new pr_* functions.

CUSE output stays completely unchanged, while FUSE output is amended a
bit for "trying to steal weird page" warning - the second line now comes
also with "fuse:" prefix. I hope it is ok.

Suggested-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Kirill Smelkov <kirr@nexedi.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index 55a26f3..4b41df1 100644 (file)
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -33,6 +33,8 @@
  * closed.
  */
 
+#define pr_fmt(fmt) "CUSE: " fmt
+
 #include <linux/fuse.h>
 #include <linux/cdev.h>
 #include <linux/device.h>
@@ -225,7 +227,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
                return 0;
 
        if (end[-1] != '\0') {
-               printk(KERN_ERR "CUSE: info not properly terminated\n");
+               pr_err("info not properly terminated\n");
                return -EINVAL;
        }
 
@@ -242,7 +244,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
                key = strstrip(key);
 
        if (!strlen(key)) {
-               printk(KERN_ERR "CUSE: zero length info key specified\n");
+               pr_err("zero length info key specified\n");
                return -EINVAL;
        }
 
@@ -282,12 +284,11 @@ static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo)
                if (strcmp(key, "DEVNAME") == 0)
                        devinfo->name = val;
                else
-                       printk(KERN_WARNING "CUSE: unknown device info \"%s\"\n",
-                              key);
+                       pr_warn("unknown device info \"%s\"\n", key);
        }
 
        if (!devinfo->name || !strlen(devinfo->name)) {
-               printk(KERN_ERR "CUSE: DEVNAME unspecified\n");
+               pr_err("DEVNAME unspecified\n");
                return -EINVAL;
        }
 
@@ -341,7 +342,7 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
        else
                rc = register_chrdev_region(devt, 1, devinfo.name);
        if (rc) {
-               printk(KERN_ERR "CUSE: failed to register chrdev region\n");
+               pr_err("failed to register chrdev region\n");
                goto err;
        }
 

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 9971a35..2d65a00 100644 (file)
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -906,8 +906,8 @@ static int fuse_check_page(struct page *page)
               1 << PG_lru |
               1 << PG_active |
               1 << PG_reclaim))) {
-               printk(KERN_WARNING "fuse: trying to steal weird page\n");
-               printk(KERN_WARNING "  page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
+               pr_warn("trying to steal weird page\n");
+               pr_warn("  page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
                return 1;
        }
        return 0;

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 0920c0c..e6195bc 100644 (file)
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -9,6 +9,10 @@
 #ifndef _FS_FUSE_I_H
 #define _FS_FUSE_I_H
 
+#ifndef pr_fmt
+# define pr_fmt(fmt) "fuse: " fmt
+#endif
+
 #include <linux/fuse.h>
 #include <linux/fs.h>
 #include <linux/mount.h>

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index ec5d995..36981ea 100644 (file)
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1397,8 +1397,8 @@ static int __init fuse_init(void)
 {
        int res;
 
-       printk(KERN_INFO "fuse init (API version %i.%i)\n",
-              FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
+       pr_info("init (API version %i.%i)\n",
+               FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
 
        INIT_LIST_HEAD(&fuse_conn_list);
        res = fuse_fs_init();
@@ -1434,7 +1434,7 @@ static int __init fuse_init(void)
 
 static void __exit fuse_exit(void)
 {
-       printk(KERN_DEBUG "fuse exit\n");
+       pr_debug("exit\n");
 
        fuse_ctl_cleanup();
        fuse_sysfs_cleanup();