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efivarfs: Add unique magic number 

Using pstore's superblock magic number is no doubt going to cause
problems in the future. Give efivarfs its own magic number.

Acked-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Matt Fleming 2012-10-22 15:51:45 +01:00
parent d292384152
commit 91716322d8
2 changed files with 2 additions and 1 deletions
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2
drivers/firmware/efivars.c
View File

@ -991,7 +991,7 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = PSTOREFS_MAGIC; sb->s_magic = EFIVARFS_MAGIC;
sb->s_op = &efivarfs_ops; sb->s_op = &efivarfs_ops;
sb->s_time_gran = 1; sb->s_time_gran = 1;

1
include/uapi/linux/magic.h
View File

@ -27,6 +27,7 @@
#define ISOFS_SUPER_MAGIC 0x9660 #define ISOFS_SUPER_MAGIC 0x9660
#define JFFS2_SUPER_MAGIC 0x72b6 #define JFFS2_SUPER_MAGIC 0x72b6
#define PSTOREFS_MAGIC 0x6165676C #define PSTOREFS_MAGIC 0x6165676C
#define EFIVARFS_MAGIC 0xde5e81e4
#define MINIX_SUPER_MAGIC 0x137F /* minix v1 fs, 14 char names */ #define MINIX_SUPER_MAGIC 0x137F /* minix v1 fs, 14 char names */
#define MINIX_SUPER_MAGIC2 0x138F /* minix v1 fs, 30 char names */ #define MINIX_SUPER_MAGIC2 0x138F /* minix v1 fs, 30 char names */