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authorDave Jones <davej@redhat.com>2014-01-23 15:55:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 16:37:01 -0800
commitc1d867a54d426b45da017fbe8e585f8a3064ce8d (patch)
tree725610a41785b7f1fb19606f2e5961ce0b857827 /fs
parentcdf7e8dded6212cb29f758017a613e4eefc4ce9e (diff)
fs/proc/proc_devtree.c: remove empty /proc/device-tree when no openfirmware exists.
Distribution kernels might want to build in support for /proc/device-tree for kernels that might end up running on hardware that doesn't support openfirmware. This results in an empty /proc/device-tree existing. Remove it if the OFW root node doesn't exist. This situation actually confuses grub2, resulting in install failures. grub2 sees the /proc/device-tree and picks the wrong install target cf. http://bzr.savannah.gnu.org/lh/grub/trunk/grub/annotate/4300/util/grub-install.in#L311 grub should be more robust, but still, leaving an empty proc dir seems pointless. Addresses https://bugzilla.redhat.com/show_bug.cgi?id=818378. Signed-off-by: Dave Jones <davej@redhat.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Paul Mackerras <paulus@samba.org> Cc: Josh Boyer <jwboyer@fedoraproject.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/proc_devtree.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index c824187251f6..c82dd5147845 100644
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -232,6 +232,7 @@ void __init proc_device_tree_init(void)
return;
root = of_find_node_by_path("/");
if (root == NULL) {
+ remove_proc_entry("device-tree", NULL);
pr_debug("/proc/device-tree: can't find root\n");
return;
}

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