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alistair23-linux/drivers/infiniband/hw/hfi1
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Mike Marciniszyn 16170d9c10 IB/hfi1: Rework debugfs to use SRCU 
The debugfs RCU trips many debug kernel warnings because of potential
sleeps with an RCU read lock held. This includes both user copy calls
and slab allocations throughout the file.

This patch switches the RCU to use SRCU for file remove/access
race protection.

In one case, the SRCU is implicit in the use of the raw debugfs file
object and just works.

In the seq_file case, a wrapper around seq_read() and seq_lseek() is
used to enforce the SRCU using the debugfs supplied functions
debugfs_use_file_start() and debugfs_use_file_stop().

The sychronize_rcu() is deleted since the SRCU prevents the remove
access race.

The RCU locking is kept for qp_stats since the QP hash list is
protected using the non-sleepable RCU.

Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
 		2016-09-02 14:26:55 -04:00
..
Kconfig Second round of merge items for 4.8 2016-08-04 20:26:31 -04:00
Makefile IB/hfi1: Remove TWSI references 2016-08-02 15:47:42 -04:00
affinity.c IB/hfi1: Remove duplicated include from affinity.c 2016-08-22 14:27:14 -04:00
affinity.h IB/hfi1: Add sysfs entry to override SDMA interrupt affinity 2016-08-02 16:00:58 -04:00
aspm.h
…
chip.c IB/hfi1: Make n_krcvqs be an unsigned long integer 2016-09-02 14:26:55 -04:00
chip.h IB/hfi1: Add QSFP sanity pre-check 2016-09-02 14:26:55 -04:00
chip_registers.h IB/hfi1: Read all firmware versions 2016-08-02 16:00:58 -04:00
common.h
…
debugfs.c IB/hfi1: Rework debugfs to use SRCU 2016-09-02 14:26:55 -04:00
debugfs.h
…
device.c
…
device.h
…
dma.c
…
driver.c IB/hfi1: Validate header in set_armed_active 2016-08-22 14:31:42 -04:00
efivar.c
…
efivar.h
…
eprom.c
…
eprom.h
…
file_ops.c IB/hfi1: Fix mm_struct use after free 2016-08-22 15:00:42 -04:00
firmware.c IB/hfi1: Read all firmware versions 2016-08-02 16:00:58 -04:00
hfi.h IB/hfi1: Make n_krcvqs be an unsigned long integer 2016-09-02 14:26:55 -04:00
init.c IB/hfi1: Make n_krcvqs be an unsigned long integer 2016-09-02 14:26:55 -04:00
intr.c
…
iowait.h
…
mad.c IB/hfi1: Fix the size parameter to find_first_bit 2016-09-02 13:46:32 -04:00
mad.h IB/hfi1: Clean up port state structure definition 2016-08-02 12:00:54 -04:00
mmu_rb.c IB/hfi1: Add cache evict LRU list 2016-08-02 22:46:21 -04:00
mmu_rb.h IB/hfi1: Remove unneeded mm argument in remove function 2016-08-02 22:46:21 -04:00
opa_compat.h
…
pcie.c IB/hfi1: Add static PCIe Gen3 CTLE tuning 2016-08-02 16:00:58 -04:00
pio.c IB/hfi1: Handle kzalloc failure in init_pervl_scs 2016-08-02 22:46:21 -04:00
pio.h
…
pio_copy.c IB/hfi1: Fix SGE length for misaligned PIO copy 2016-09-02 14:26:55 -04:00
platform.c IB/hfi1: Reset QSFP on every run through channel tuning 2016-08-02 16:00:58 -04:00
platform.h
…
qp.c IB/hfi1,IB/qib: Fix qp_stats sleep with rcu read lock held 2016-08-22 14:31:34 -04:00
qp.h IB/hfi1: Rename struct ahg_ib_header to struct hfi1_ahg_info 2016-08-02 16:00:58 -04:00
qsfp.c IB/hfi1: Fetch monitor values on-demand for CableInfo query 2016-08-22 14:31:41 -04:00
qsfp.h IB/hfi1: Fetch monitor values on-demand for CableInfo query 2016-08-22 14:31:41 -04:00
rc.c IB/rdmavt, hfi1: Fix NFSoRDMA failure with FRMR enabled 2016-08-02 16:00:58 -04:00
ruc.c IB/hfi1: Rename hfi1_pio_header to hfi1_sdma_header. 2016-08-02 16:00:58 -04:00
sdma.c
…
sdma.h
…
sdma_txreq.h
…
sysfs.c IB/hfi1: Add sysfs entry to override SDMA interrupt affinity 2016-08-02 16:00:58 -04:00
trace.c IB/hfi1: Suppress sparse warnings 2016-06-06 19:37:23 -04:00
trace.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_ctxts.h IB/hfi1: Fix trace sparse errors 2016-08-02 12:00:54 -04:00
trace_dbg.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_ibhdrs.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_misc.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_rc.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_rx.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_tx.h IB/hfi1: Fix trace sparse errors 2016-08-02 12:00:54 -04:00
uc.c IB/rdmavt, hfi1: Fix NFSoRDMA failure with FRMR enabled 2016-08-02 16:00:58 -04:00
ud.c IB/qib, IB/hfi1: Fix grh creation in ud loopback 2016-08-02 16:00:58 -04:00
user_exp_rcv.c IB/hfi1: Fix memory leak during unexpected shutdown 2016-08-02 22:46:21 -04:00
user_exp_rcv.h
…
user_pages.c IB/hfi1: Make use of mm consistent 2016-08-02 22:46:21 -04:00
user_sdma.c IB/hfi1: Fix AHG KDETH Intr shift 2016-09-02 14:26:55 -04:00
user_sdma.h IB/hfi1: Use evict mmu rb operation 2016-08-02 22:46:21 -04:00
verbs.c Second round of merge items for 4.8 2016-08-04 20:26:31 -04:00
verbs.h IB/hfi1: Rename hfi1_pio_header to hfi1_sdma_header. 2016-08-02 16:00:58 -04:00
verbs_txreq.c IB/hfi1: Fix deadlock with txreq allocation slow path 2016-06-23 10:16:15 -04:00
verbs_txreq.h IB/hfi1: Rename hfi1_pio_header to hfi1_sdma_header. 2016-08-02 16:00:58 -04:00