From: Matt Fleming
Git-commit: e913ca7d16d70b75367ff56a3b201980501d542c
Patch-mainline: v3.8
References: bnc#808680
Target: openSUSE 12.3
Signed-off-by: Matt Fleming
Acked-by: Lee, Chun-Yi
---
Documentation/filesystems/00-INDEX | 2 ++
Documentation/filesystems/efivarfs.txt | 16 ++++++++++++++++
2 files changed, 18 insertions(+)
create mode 100644 Documentation/filesystems/efivarfs.txt
--- a/Documentation/filesystems/00-INDEX
+++ b/Documentation/filesystems/00-INDEX
@@ -38,6 +38,8 @@ dnotify_test.c
- example program for dnotify
ecryptfs.txt
- docs on eCryptfs: stacked cryptographic filesystem for Linux.
+efivarfs.txt
+ - info for the efivarfs filesystem.
exofs.txt
- info, usage, mount options, design about EXOFS.
ext2.txt
--- /dev/null
+++ b/Documentation/filesystems/efivarfs.txt
@@ -0,0 +1,16 @@
+
+efivarfs - a (U)EFI variable filesystem
+
+The efivarfs filesystem was created to address the shortcomings of
+using entries in sysfs to maintain EFI variables. The old sysfs EFI
+variables code only supported variables of up to 1024 bytes. This
+limitation existed in version 0.99 of the EFI specification, but was
+removed before any full releases. Since variables can now be larger
+than a single page, sysfs isn't the best interface for this.
+
+Variables can be created, deleted and modified with the efivarfs
+filesystem.
+
+efivarfs is typically mounted like this,
+
+ mount -t efivarfs none /sys/firmware/efi/efivars
--
To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org
To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org
