From: Karel Zak <kzak@redhat.com>
Date: Tue, 12 Apr 2022 09:56:40 +0000 (+0200)
Subject: libfdisk: (gpt) add comment
X-Git-Tag: v2.39-rc1~717
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=654a443a628e21cc1ab016ff227fc81563b13c6e;p=thirdparty%2Futil-linux.git

libfdisk: (gpt) add comment

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/libfdisk/src/gpt.c b/libfdisk/src/gpt.c
index c6f482fd86..c132739b2b 100644
--- a/libfdisk/src/gpt.c
+++ b/libfdisk/src/gpt.c
@@ -2122,13 +2122,14 @@ static int gpt_write_pmbr(struct fdisk_context *cxt)
 		pmbr->partition_record[0].size_in_lba =
 			cpu_to_le32((uint32_t) (cxt->total_sectors - 1ULL));
 
+	/* Read the current PMBR and compare it with the new, don't write if
+	 * the same. */
 	current = malloc(sizeof(*current));
 	if (!current)
 		goto do_write;
 
 	rc = gpt_read(cxt, GPT_PMBR_LBA * cxt->sector_size,
 		      current, cxt->sector_size);
-
 	if (!rc)
 		rc = memcmp(pmbr, current, sizeof(*current));