misc: Use allocate_once in getmntent

Both the buffer and struct mntent are now allocated on the heap.
This results in a slight reduction of RSS usage.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index a0c6a0e1f1..37c2ff3280 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2019-08-28  Florian Weimer  <fweimer@redhat.com>
 
+	* misc/mntent.c (struct mntent_buffer): Define.
+	(mntent_buffer): Adjust type to void *.
+	(allocate): Adjust for allocate_once.
+	(deallocate): New function.
+	(getmntent): Call allocate_once.
+
+2019-08-28  Florian Weimer  <fweimer@redhat.com>
+
 	nptl: Move pthread_attr_setdetachstate implementation into libc.
 	* nptl/Makefile (routines): Add pthread_attr_setdetachstate.
 	(libpthread-routines): Remove pthread_attr_setdetachstate.