linux-kernel - [PATCH v2] block: remove never-modified global variable

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Date:	Wed, 20 May 2015 17:32:29 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Jens Axboe <axboe@...com>
Cc:	<linux-kernel@...r.kernel.org>, Boaz Harrosh <boaz@...xistor.com>,
	Brian Norris <computersforpeace@...il.com>,
	Christoph Hellwig <hch@...radead.org>
Subject: [PATCH v2] block: remove never-modified global variable

AFAICT, 'warn_no_part' never takes (and never has? at least, not in the
git history) taken a value besides 1. It also has a disgruntled warning
comment next to it, suggesting it shouldn't be there at all.

While removing the 'warn_no_part' check, let's combine a pair of string
cat/print into a single print, and reduce the err/res logic to something
simpler.

Signed-off-by: Brian Norris <computersforpeace@...il.com>
Reviewed-by: Boaz Harrosh <boaz@...xistor.com>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Jens Axboe <axboe@...com>
---
v2:
  - combine the cat/print lines
  - simplify the err/res logic

 block/partitions/amiga.c | 10 ++++------
 block/partitions/check.c | 13 +++----------
 block/partitions/check.h |  2 --
 3 files changed, 7 insertions(+), 18 deletions(-)

diff --git a/block/partitions/amiga.c b/block/partitions/amiga.c
index 2b13533d60a2..9dbf1cec7152 100644
--- a/block/partitions/amiga.c
+++ b/block/partitions/amiga.c
@@ -41,9 +41,8 @@ int amiga_partition(struct parsed_partitions *state)
 			goto rdb_done;
 		data = read_part_sector(state, blk, &sect);
 		if (!data) {
-			if (warn_no_part)
-				pr_err("Dev %s: unable to read RDB block %d\n",
-				       bdevname(state->bdev, b), blk);
+			pr_err("Dev %s: unable to read RDB block %d\n",
+			       bdevname(state->bdev, b), blk);
 			res = -1;
 			goto rdb_done;
 		}
@@ -84,9 +83,8 @@ int amiga_partition(struct parsed_partitions *state)
 		blk *= blksize;	/* Read in terms partition table understands */
 		data = read_part_sector(state, blk, &sect);
 		if (!data) {
-			if (warn_no_part)
-				pr_err("Dev %s: unable to read partition block %d\n",
-				       bdevname(state->bdev, b), blk);
+			pr_err("Dev %s: unable to read partition block %d\n",
+			       bdevname(state->bdev, b), blk);
 			res = -1;
 			goto rdb_done;
 		}
diff --git a/block/partitions/check.c b/block/partitions/check.c
index 16118d11dbfc..2f83651692ef 100644
--- a/block/partitions/check.c
+++ b/block/partitions/check.c
@@ -36,8 +36,6 @@
 #include "sysv68.h"
 #include "cmdline.h"
 
-int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/
-
 static int (*check_part[])(struct parsed_partitions *) = {
 	/*
 	 * Probe partition formats with tables at disk address 0
@@ -183,15 +181,10 @@ check_partition(struct gendisk *hd, struct block_device *bdev)
 		err = -ENOSPC;
 	if (err)
 	/* The partition is unrecognized. So report I/O errors if there were any */
-		res = err;
-	if (res) {
-		if (warn_no_part)
-			strlcat(state->pp_buf,
-				" unable to read partition table\n", PAGE_SIZE);
-		printk(KERN_INFO "%s", state->pp_buf);
-	}
+		printk(KERN_INFO "%s unable to read partition table\n",
+		       state->pp_buf);
 
 	free_page((unsigned long)state->pp_buf);
 	free_partitions(state);
-	return ERR_PTR(res);
+	return ERR_PTR(err);
 }
diff --git a/block/partitions/check.h b/block/partitions/check.h
index eade17ea910b..e09fac216adc 100644
--- a/block/partitions/check.h
+++ b/block/partitions/check.h
@@ -50,5 +50,3 @@ put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
 	}
 }
 
-extern int warn_no_part;
-
-- 
1.9.1

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