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    Subject[PATCH] nfs: init req_lock in nfs_alloc_inode
    Seems like req_lock is never initialized. CONFIG_DEBUG_SPINLOCK reported:

    BUG: spinlock bad magic on CPU#0, mount/1073
    lock: c00000007fdca108, .magic: 00000000, .owner: /24576, .owner_cpu: 0
    Call Trace:
    [C00000007E913750] [C0000000000107B4] .show_stack+0x54/0x1f0 (unreliable)
    [C00000007E913800] [C0000000001D2234] .spin_bug+0xa4/0x120
    [C00000007E913890] [C0000000001D247C] ._raw_spin_lock+0xdc/0x1d0
    [C00000007E913930] [C0000000004DF990] ._spin_lock+0x10/0x30
    [C00000007E9139B0] [C00000000017623C] .nfs_sync_mapping_wait+0xac/0x310
    [C00000007E913AA0] [C000000000176F18] .nfs_sync_mapping_range+0x98/0x110
    [C00000007E913B80] [C00000000016CAA0] .nfs_getattr+0x40/0xf0
    [C00000007E913C20] [C0000000000BE668] .vfs_getattr+0x38/0x70
    [C00000007E913CA0] [C0000000000BF05C] .vfs_fstat+0x3c/0x70
    [C00000007E913D30] [C0000000000BF0B8] .sys_fstat64+0x28/0x60
    [C00000007E913E30] [C000000000008608] syscall_exit+0x0/0x40

    Signed-off-by: Olof Johansson <>


    Trond, is your MAINTAINERS entry up to date? Seems like you mostly post
    from these days.

    Index: linux-2.6/fs/nfs/inode.c
    --- linux-2.6.orig/fs/nfs/inode.c
    +++ linux-2.6/fs/nfs/inode.c
    @@ -1123,6 +1123,7 @@ struct inode *nfs_alloc_inode(struct sup
    nfsi->flags = 0UL;
    nfsi->cache_validity = 0UL;
    nfsi->cache_change_attribute = jiffies;
    + nfsi->req_lock = SPIN_LOCK_UNLOCKED;
    #ifdef CONFIG_NFS_V3_ACL
    nfsi->acl_access = ERR_PTR(-EAGAIN);
    nfsi->acl_default = ERR_PTR(-EAGAIN);
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      Last update: 2007-02-16 17:59    [W:0.019 / U:1.800 seconds]
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