From a109bb6d0eb936ac4e2a9f0ee46a269a58ec48ce Mon Sep 17 00:00:00 2001
From: root <root@arianrhod.panaceas.james.local>
Date: Fri, 16 Nov 2012 11:52:02 +0000
Subject: fish

---
 master/debian/lazy_stat.patch | 73 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 master/debian/lazy_stat.patch

(limited to 'master/debian/lazy_stat.patch')

diff --git a/master/debian/lazy_stat.patch b/master/debian/lazy_stat.patch
new file mode 100644
index 0000000..b2cdfd2
--- /dev/null
+++ b/master/debian/lazy_stat.patch
@@ -0,0 +1,73 @@
+Description: Don't stat devices unless we have to
+Author: Vladimir Serbinenko <phcoder@gmail.com>
+Author: Colin Watson <cjwatson@ubuntu.com>
+Bug-Debian: http://bugs.debian.org/627587
+Forwarded: yes
+Applied-Upstream: http://bazaar.launchpad.net/~vcs-imports/grub/grub2-bzr/revision/3318
+Last-Update: 2011-05-31
+
+Index: b/grub-core/kern/emu/getroot.c
+===================================================================
+--- a/grub-core/kern/emu/getroot.c
++++ b/grub-core/kern/emu/getroot.c
+@@ -358,7 +358,7 @@
+ 
+       if (S_ISLNK (st.st_mode)) {
+ #ifdef __linux__
+-	if (strcmp (dir, "mapper") == 0) {
++	if (strcmp (dir, "mapper") == 0 || strcmp (dir, "/dev/mapper") == 0) {
+ 	  /* Follow symbolic links under /dev/mapper/; the canonical name
+ 	     may be something like /dev/dm-0, but the names under
+ 	     /dev/mapper/ are more human-readable and so we prefer them if
+@@ -609,20 +609,27 @@
+ 
+   if (os_dev)
+     {
+-      if (stat (os_dev, &st) >= 0)
+-	dev = st.st_rdev;
+-      else
+-	grub_util_error ("cannot stat `%s'", os_dev);
+-      free (os_dev);
++      char *tmp = os_dev;
++      os_dev = canonicalize_file_name (os_dev);
++      free (tmp);
+     }
+-  else
++
++  if (os_dev)
+     {
+-      if (stat (dir, &st) >= 0)
+-	dev = st.st_dev;
+-      else
+-	grub_util_error ("cannot stat `%s'", dir);
++      if (strncmp (os_dev, "/dev/dm-", sizeof ("/dev/dm-") - 1) != 0)
++	return os_dev;
++      if (stat (os_dev, &st) < 0)
++	grub_util_error ("cannot stat `%s'", os_dev);
++      free (os_dev);
++      dev = st.st_rdev;
++      return grub_find_device ("/dev/mapper", dev);
+     }
+ 
++  if (stat (dir, &st) < 0)
++    grub_util_error ("cannot stat `%s'", dir);
++
++  dev = st.st_dev;
++  
+ #ifdef __CYGWIN__
+   /* Cygwin specific function.  */
+   os_dev = grub_find_device (dir, dev);
+Index: b/grub-core/kern/emu/hostdisk.c
+===================================================================
+--- a/grub-core/kern/emu/hostdisk.c
++++ b/grub-core/kern/emu/hostdisk.c
+@@ -1420,7 +1420,8 @@
+ 		  if (tree)
+ 		    dm_tree_free (tree);
+ 		  free (path);
+-		  char *ret = grub_find_device (NULL, (major << 8) | minor);
++		  char *ret = grub_find_device ("/dev/mapper",
++						(major << 8) | minor);
+ 		  return ret;
+ 		}
+ 
-- 
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