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From:   Charan Teja Kalla <quic_charante@quicinc.com>
To:     <akpm@linux-foundation.org>, <david@redhat.com>, <vbabka@suse.cz>,
        <quic_pkondeti@quicinc.com>, <minchan@kernel.org>
CC:     <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
        Charan Teja Kalla <quic_charante@quicinc.com>
Subject: [PATCH] mm/cma_debug: show complete cma name in debugfs directories
Date:   Wed, 10 Aug 2022 22:58:05 +0530
Message-ID: <1660152485-17684-1-git-send-email-quic_charante@quicinc.com>
MIME-Version: 1.0
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Currently only 12 characters of the cma name is being used as the debug
directories where as the cma name can be of length CMA_MAX_NAME(=64)
characters. One side problem with this is having 2 cma's with first
common 12 characters would end up in trying to create directories with
same name and fails with -EEXIST thus can limit cma debug functionality.

Also drop 'cma-' prefix for the cma debug directories as they are
clearly evident that they are for cma debug through creating them in
/sys/kernel/debug/cma/ path.

Signed-off-by: Charan Teja Kalla <quic_charante@quicinc.com>
---
 mm/cma_debug.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 2e77049..602fff8 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -163,11 +163,8 @@ DEFINE_DEBUGFS_ATTRIBUTE(cma_alloc_fops, NULL, cma_alloc_write, "%llu\n");
 static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
 {
 	struct dentry *tmp;
-	char name[16];
 
-	scnprintf(name, sizeof(name), "cma-%s", cma->name);
-
-	tmp = debugfs_create_dir(name, root_dentry);
+	tmp = debugfs_create_dir(cma->name, root_dentry);
 
 	debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);
 	debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);
-- 
2.7.4