• James Bottomley's avatar
    parisc: pdc_stable: Fix locking when creating sysfs links · 93964fd4
    James Bottomley authored
    There's no need to take the write lock when creating sysfs links.
    
    This patch fixes the following BUG:
     BUG: sleeping function called from invalid context at mm/slab.h:416
     in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: swapper/0
     CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.13.0-rc2-00110-g0b5477d9 #111
     Backtrace:
     [<0000000040217ac8>] show_stack+0x20/0x38
     [<00000000406fbbb0>] dump_stack+0xb0/0x128
     [<0000000040274090>] ___might_sleep+0x180/0x1b8
     [<0000000040274144>] __might_sleep+0x7c/0xe8
     [<0000000040373874>] kmem_cache_alloc+0x14c/0x1e0
     [<0000000040419514>] __kernfs_new_node+0x84/0x1b8
     [<000000004041b09c>] kernfs_new_node+0x3c/0x78
     [<000000004041e040>] kernfs_create_link+0x40/0xd8
     [<000000004041f320>] sysfs_do_create_link_sd.isra.0+0xb0/0x130
     [<000000004041f3d4>] sysfs_create_link+0x34/0x58
     [<000000004011b4a4>] pdc_stable_init+0x2c4/0x458
     [<0000000040200250>] do_one_initcall+0x70/0x1d8
     [<0000000040101644>] kernel_init_freeable+0x27c/0x390
     [<000000004020be44>] kernel_init+0x24/0x1c0
    Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
    Reported-by: default avatarMeelis Roos <mroos@linux.ee>
    Signed-off-by: default avatarHelge Deller <deller@gmx.de>
    93964fd4