Pull RCU updates from Ingo Molnar: "The biggest RCU changes in this cycle were: - Convert RCU's BUG_ON() and similar calls to WARN_ON() and similar. - Replace calls of RCU-bh and RCU-sched update-side functions to their vanilla RCU counterparts. This series is a step towards complete removal of the RCU-bh and RCU-sched update-side functions. ( Note that some of these conversions are going upstream via their respective maintainers. ) - Documentation updates, including a number of flavor-consolidation updates from Joel Fernandes. - Miscellaneous fixes. - Automate generation of the initrd filesystem used for rcutorture testing. - Convert spin_is_locked() assertions to instead use lockdep. ( Note that some of these conversions are going upstream via their respective maintainers. ) - SRCU updates, especially including a fix from Dennis Krein for a bag-on-head-class bug. - RCU torture-test updates" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (112 commits) rcutorture: Don't do busted forward-progress testing rcutorture: Use 100ms buckets for forward-progress callback histograms rcutorture: Recover from OOM during forward-progress tests rcutorture: Print forward-progress test age upon failure rcutorture: Print time since GP end upon forward-progress failure rcutorture: Print histogram of CB invocation at OOM time rcutorture: Print GP age upon forward-progress failure rcu: Print per-CPU callback counts for forward-progress failures rcu: Account for nocb-CPU callback counts in RCU CPU stall warnings rcutorture: Dump grace-period diagnostics upon forward-progress OOM rcutorture: Prepare for asynchronous access to rcu_fwd_startat torture: Remove unnecessary "ret" variables rcutorture: Affinity forward-progress test to avoid housekeeping CPUs rcutorture: Break up too-long rcu_torture_fwd_prog() function rcutorture: Remove cbflood facility torture: Bring any extra CPUs online during kernel startup rcutorture: Add call_rcu() flooding forward-progress tests rcutorture/formal: Replace synchronize_sched() with synchronize_rcu() tools/kernel.h: Replace synchronize_sched() with synchronize_rcu() net/decnet: Replace rcu_barrier_bh() with rcu_barrier() ...
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| @@ -573,6 +573,27 @@ foreach my $entry (@mode_permission_funcs) { · 572 unmodified lines | |||
| 573 | } | 573 | } |
| 574 | $mode_perms_search = "(?:${mode_perms_search})"; | 574 | $mode_perms_search = "(?:${mode_perms_search})"; |
| 575 | 575 | ||
| 576 | our %deprecated_apis = ( | ||
| 577 | "synchronize_rcu_bh" => "synchronize_rcu", | ||
| 578 | "synchronize_rcu_bh_expedited" => "synchronize_rcu_expedited", | ||
| 579 | "call_rcu_bh" => "call_rcu", | ||
| 580 | "rcu_barrier_bh" => "rcu_barrier", | ||
| 581 | "synchronize_sched" => "synchronize_rcu", | ||
| 582 | "synchronize_sched_expedited" => "synchronize_rcu_expedited", | ||
| 583 | "call_rcu_sched" => "call_rcu", | ||
| 584 | "rcu_barrier_sched" => "rcu_barrier", | ||
| 585 | "get_state_synchronize_sched" => "get_state_synchronize_rcu", | ||
| 586 | "cond_synchronize_sched" => "cond_synchronize_rcu", | ||
| 587 | ); | ||
| 588 | |||
| 589 | #Create a search pattern for all these strings to speed up a loop below | ||
| 590 | our $deprecated_apis_search = ""; | ||
| 591 | foreach my $entry (keys %deprecated_apis) { | ||
| 592 | $deprecated_apis_search .= '|' if ($deprecated_apis_search ne ""); | ||
| 593 | $deprecated_apis_search .= $entry; | ||
| 594 | } | ||
| 595 | $deprecated_apis_search = "(?:${deprecated_apis_search})"; | ||
| 596 | |||
| 576 | our $mode_perms_world_writable = qr{ | 597 | our $mode_perms_world_writable = qr{ |
| 577 | S_IWUGO | | 598 | S_IWUGO | |
| 578 | S_IWOTH | | 599 | S_IWOTH | |
| @@ -6368,6 +6389,20 @@ sub process { · 5789 unmodified lines | |||
| 6368 | "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr); | 6389 | "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr); |
| 6369 | } | 6390 | } |
| 6370 | 6391 | ||
| 6392 | # check for spin_is_locked(), suggest lockdep instead | ||
| 6393 | if ($line =~ /\bspin_is_locked\(/) { | ||
| 6394 | WARN("USE_LOCKDEP", | ||
| 6395 | "Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked\n" . $herecurr); | ||
| 6396 | } | ||
| 6397 | |||
| 6398 | # check for deprecated apis | ||
| 6399 | if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) { | ||
| 6400 | my $deprecated_api = $1; | ||
| 6401 | my $new_api = $deprecated_apis{$deprecated_api}; | ||
| 6402 | WARN("DEPRECATED_API", | ||
| 6403 | "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr); | ||
| 6404 | } | ||
| 6405 | |||
| 6371 | # check for various structs that are normally const (ops, kgdb, device_tree) | 6406 | # check for various structs that are normally const (ops, kgdb, device_tree) |
| 6372 | # and avoid what seem like struct definitions 'struct foo {' | 6407 | # and avoid what seem like struct definitions 'struct foo {' |
| 6373 | if ($line !~ /\bconst\b/ && | 6408 | if ($line !~ /\bconst\b/ && |