[lvm-devel] main - cleanup: avoid allocating memory for hash key
Zdenek Kabelac
zkabelac at sourceware.org
Mon Mar 8 14:46:54 UTC 2021
Gitweb: https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=dac990ae03f9517e050f8ea3a55529e944c60f4f
Commit: dac990ae03f9517e050f8ea3a55529e944c60f4f
Parent: d3cff64408d63dfae20e3e3b307915dc08436ef8
Author: Zdenek Kabelac <zkabelac at redhat.com>
AuthorDate: Thu Mar 4 18:17:03 2021 +0100
Committer: Zdenek Kabelac <zkabelac at redhat.com>
CommitterDate: Mon Mar 8 15:43:27 2021 +0100
cleanup: avoid allocating memory for hash key
Hash always allocates its own copy of the key so avoid
this extra uuid copy.
---
lib/format_text/export.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/format_text/export.c b/lib/format_text/export.c
index 7a95bdba4..cdae8bc87 100644
--- a/lib/format_text/export.c
+++ b/lib/format_text/export.c
@@ -955,7 +955,8 @@ static int _build_pv_names(struct formatter *f, struct volume_group *vg)
int count = 0;
struct pv_list *pvl;
struct physical_volume *pv;
- char buffer[32], *uuid, *name;
+ char buffer[32], *name;
+ char uuid[64];
if (!(f->mem = dm_pool_create("text pv_names", 512)))
return_0;
@@ -973,8 +974,7 @@ static int _build_pv_names(struct formatter *f, struct volume_group *vg)
if (!(name = dm_pool_strdup(f->mem, buffer)))
return_0;
- if (!(uuid = dm_pool_zalloc(f->mem, 64)) ||
- !id_write_format(&pv->id, uuid, 64))
+ if (!id_write_format(&pv->id, uuid, sizeof(uuid)))
return_0;
if (!dm_hash_insert(f->pv_names, uuid, name))
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