linux-kernel - Re: [PATCH v4 4/9] vsprintf: Consolidate handling of unknown pointer specifiers

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Date:   Thu, 05 Apr 2018 16:55:35 -0700
From:   Joe Perches <joe@...ches.com>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Petr Mladek <pmladek@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Tobin C . Harding" <me@...in.cc>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.cz>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/9] vsprintf: Consolidate handling of unknown
 pointer specifiers

On Thu, 2018-04-05 at 16:45 -0700, Joe Perches wrote:
> On Thu, 2018-04-05 at 16:25 +0200, Rasmus Villemoes wrote:
> > Even just git grep -1 -E '%p"$' finds %pt and %po
> > which should get fixed before somebody claims those extensions.
> 
> Neither %pt nor %po is used in a vsprintf
> in the kernel.

Nope, you are right, both are defectively used in the
kernel via string concatenation.

Also there's a missing space in a concatenation adjacent.

---
 arch/s390/kernel/perf_cpum_sf.c           | 4 +---
 drivers/scsi/megaraid/megaraid_sas_base.c | 7 ++-----
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 1c9ddd7aa5ec..458b8f321043 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -212,9 +212,7 @@ static int realloc_sampling_buffer(struct sf_buffer *sfb,
 	 * the sampling buffer origin.
 	 */
 	if (sfb->sdbt != get_next_sdbt(tail)) {
-		debug_sprintf_event(sfdbg, 3, "realloc_sampling_buffer: "
-				    "sampling buffer is not linked: origin=%p"
-				    "tail=%p\n",
+		debug_sprintf_event(sfdbg, 3, "%s: sampling buffer is not linked: origin=%p tail=%p\n",
 				    (void *) sfb->sdbt, (void *) tail);
 		return -EINVAL;
 	}
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index b89c6e6c0589..56f1c8132664 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -3546,14 +3546,11 @@ megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
 	for (i = 0; i < max_cmd; i++) {
 		cmd = instance->cmd_list[i];
 		if (cmd->sync_cmd == 1 || cmd->scmd) {
-			dev_notice(&instance->pdev->dev, "moving cmd[%d]:%p:%d:%p"
-					"on the defer queue as internal\n",
+			dev_notice(&instance->pdev->dev, "moving cmd[%d]:%p:%d:%p on the defer queue as internal\n",
 				defer_index, cmd, cmd->sync_cmd, cmd->scmd);
 
 			if (!list_empty(&cmd->list)) {
-				dev_notice(&instance->pdev->dev, "ERROR while"
-					" moving this cmd:%p, %d %p, it was"
-					"discovered on some list?\n",
+				dev_notice(&instance->pdev->dev, "ERROR while moving this cmd:%p, %d %p, it was discovered on some list?\n",
 					cmd, cmd->sync_cmd, cmd->scmd);
 
 				list_del_init(&cmd->list);