mirror of
https://src.fedoraproject.org/rpms/grub2.git
synced 2024-11-24 06:22:43 +00:00
32 lines
1 KiB
Diff
32 lines
1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Michael Chang <mchang@suse.com>
|
|
Date: Tue, 24 Apr 2018 14:13:04 +0800
|
|
Subject: [PATCH] bufio: Round up block size to power of 2
|
|
|
|
Rounding up the bufio->block_size to meet power of 2 to facilitate next_buf
|
|
calculation in grub_bufio_read().
|
|
|
|
Signed-off-by: Michael Chang <mchang@suse.com>
|
|
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
---
|
|
grub-core/io/bufio.c | 7 +++++++
|
|
1 file changed, 7 insertions(+)
|
|
|
|
diff --git a/grub-core/io/bufio.c b/grub-core/io/bufio.c
|
|
index 22438277d74..dbed6474431 100644
|
|
--- a/grub-core/io/bufio.c
|
|
+++ b/grub-core/io/bufio.c
|
|
@@ -61,6 +61,13 @@ grub_bufio_open (grub_file_t io, int size)
|
|
size = ((io->size > GRUB_BUFIO_MAX_SIZE) ? GRUB_BUFIO_MAX_SIZE :
|
|
io->size);
|
|
|
|
+ /*
|
|
+ * Round up size to power of 2 which the binary math to
|
|
+ * calculate next_buf in grub_bufio_read() requires.
|
|
+ */
|
|
+ while (size & (size - 1))
|
|
+ size = (size | (size - 1)) + 1;
|
|
+
|
|
bufio = grub_zalloc (sizeof (struct grub_bufio) + size);
|
|
if (! bufio)
|
|
{
|