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authorIdo Schimmel <idosch@mellanox.com>2017-02-08 11:16:29 +0100
committerDavid S. Miller <davem@davemloft.net>2017-02-08 15:25:15 -0500
commite9ad5e7d8d3cf55ceb204b0f7a26c89bfd4b41fe (patch)
tree8b42a9a04d40fdf9a3ac8409698531fd4fd2781a /sound/ppc/snd_ps3.h
parente58be79e2dc818b0e2b3c69ea3d3fefcbc8c709b (diff)
mlxsw: spectrum_router: Store nexthop groups in a hash table
Currently, when we're notified about a new RTN_UNICAST route we perform a lookup on the nexthop group list looking for a group with a matching configuration to that found in the FIB info. This is quite inefficient. Instead, we can simply rely on the kernel to consolidate several FIB configurations into the same FIB info and use the FIB info as the key for our private nexthop group struct. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/ppc/snd_ps3.h')
0 files changed, 0 insertions, 0 deletions
50 __schedule+0x2f8/0x970 schedule+0x48/0xc0 blk_mq_freeze_queue_wait+0x94/0x120 blk_mq_queue_reinit_work+0xb8/0x180 blk_mq_queue_reinit_prepare+0x84/0xa0 cpuhp_invoke_callback+0x17c/0x600 cpuhp_up_callbacks+0x58/0x150 _cpu_up+0xf0/0x1c0 do_cpu_up+0x120/0x150 cpu_subsys_online+0x64/0xe0 device_online+0xb4/0x120 online_store+0xb4/0xc0 dev_attr_store+0x68/0xa0 sysfs_kf_write+0x80/0xb0 kernfs_fop_write+0x17c/0x250 __vfs_write+0x6c/0x1e0 vfs_write+0xd0/0x270 SyS_write+0x6c/0x110 system_call+0x38/0xe0 Examination of the queue showed a single reference (no PERCPU_COUNT_BIAS, and __PERCPU_REF_DEAD, __PERCPU_REF_ATOMIC set) and no requests. However, conditions at the time of the race are count of PERCPU_COUNT_BIAS + 0 and __PERCPU_REF_DEAD and __PERCPU_REF_ATOMIC set. The fix is to make the tryget routines use an actual boolean internally instead of the atomic long result truncated to a int. Fixes: e625305b3907 percpu-refcount: make percpu_ref based on longs instead of ints Link: https://bugzilla.kernel.org/show_bug.cgi?id=190751 Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Fixes: e625305b3907 ("percpu-refcount: make percpu_ref based on longs instead of ints") Cc: stable@vger.kernel.org # v3.18+
Diffstat (limited to 'drivers/usb/gadget/function/f_uvc.c')