Define pr_fmt macro with {ERST DBG: } prefix, then remove all use
of ERST_DBG_PFX in the pr_* functions.

Signed-off-by: Wang Long <long.wangl...@huawei.com>
---
 drivers/acpi/apei/erst-dbg.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index 3a57ffb..c38133a 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -23,6 +23,8 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/uaccess.h>
@@ -31,8 +33,6 @@
 
 #include "apei-internal.h"
 
-#define ERST_DBG_PFX                   "ERST DBG: "
-
 #define ERST_DBG_RECORD_LEN_MAX                0x4000
 
 static void *erst_dbg_buf;
@@ -130,8 +130,7 @@ retry:
        if (rc < 0)
                goto out;
        if (len > ERST_DBG_RECORD_LEN_MAX) {
-               pr_warn(ERST_DBG_PFX
-                          "Record (ID: 0x%llx) length is too long: %zd\n",
+               pr_warn("Record (ID: 0x%llx) length is too long: %zd\n",
                           id, len);
                rc = -EIO;
                goto out;
@@ -171,7 +170,7 @@ static ssize_t erst_dbg_write(struct file *filp, const char 
__user *ubuf,
                return -EPERM;
 
        if (usize > ERST_DBG_RECORD_LEN_MAX) {
-               pr_err(ERST_DBG_PFX "Too long record to be written\n");
+               pr_err("Too long record to be written\n");
                return -EINVAL;
        }
 
@@ -223,7 +222,7 @@ static struct miscdevice erst_dbg_dev = {
 static __init int erst_dbg_init(void)
 {
        if (erst_disable) {
-               pr_info(ERST_DBG_PFX "ERST support is disabled.\n");
+               pr_info("ERST support is disabled.\n");
                return -ENODEV;
        }
        return misc_register(&erst_dbg_dev);
-- 
1.8.3.4

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