Commit-ID: 1ad9ff7dea4c42bee43f98b7d7ce8037ee22e133 Gitweb: https://git.kernel.org/tip/1ad9ff7dea4c42bee43f98b7d7ce8037ee22e133 Author: Jiri Olsa <[email protected]> AuthorDate: Mon, 12 Mar 2018 14:45:42 +0100 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 13 Mar 2018 06:56:07 +0100
hw_breakpoint: Pass bp_type argument to __reserve_bp_slot|__release_bp_slot() Passing bp_type argument to __reserve_bp_slot() and __release_bp_slot() functions, so we can pass another bp_type than the one defined in bp->attr.bp_type. This will be handy in following change that fixes breakpoint slot counts during its modification. Signed-off-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: David Ahern <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Hari Bathini <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Kan Liang <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Milind Chabbi <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Will Deacon <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/events/hw_breakpoint.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c index 395ca07965af..9b31fbcc3305 100644 --- a/kernel/events/hw_breakpoint.c +++ b/kernel/events/hw_breakpoint.c @@ -277,7 +277,7 @@ __weak void arch_unregister_hw_breakpoint(struct perf_event *bp) * ((per_cpu(info->flexible, *) > 1) + max(per_cpu(info->cpu_pinned, *)) * + max(per_cpu(info->tsk_pinned, *))) < HBP_NUM */ -static int __reserve_bp_slot(struct perf_event *bp) +static int __reserve_bp_slot(struct perf_event *bp, u64 bp_type) { struct bp_busy_slots slots = {0}; enum bp_type_idx type; @@ -288,11 +288,11 @@ static int __reserve_bp_slot(struct perf_event *bp) return -ENOMEM; /* Basic checks */ - if (bp->attr.bp_type == HW_BREAKPOINT_EMPTY || - bp->attr.bp_type == HW_BREAKPOINT_INVALID) + if (bp_type == HW_BREAKPOINT_EMPTY || + bp_type == HW_BREAKPOINT_INVALID) return -EINVAL; - type = find_slot_idx(bp->attr.bp_type); + type = find_slot_idx(bp_type); weight = hw_breakpoint_weight(bp); fetch_bp_busy_slots(&slots, bp, type); @@ -317,19 +317,19 @@ int reserve_bp_slot(struct perf_event *bp) mutex_lock(&nr_bp_mutex); - ret = __reserve_bp_slot(bp); + ret = __reserve_bp_slot(bp, bp->attr.bp_type); mutex_unlock(&nr_bp_mutex); return ret; } -static void __release_bp_slot(struct perf_event *bp) +static void __release_bp_slot(struct perf_event *bp, u64 bp_type) { enum bp_type_idx type; int weight; - type = find_slot_idx(bp->attr.bp_type); + type = find_slot_idx(bp_type); weight = hw_breakpoint_weight(bp); toggle_bp_slot(bp, false, type, weight); } @@ -339,7 +339,7 @@ void release_bp_slot(struct perf_event *bp) mutex_lock(&nr_bp_mutex); arch_unregister_hw_breakpoint(bp); - __release_bp_slot(bp); + __release_bp_slot(bp, bp->attr.bp_type); mutex_unlock(&nr_bp_mutex); } @@ -354,7 +354,7 @@ int dbg_reserve_bp_slot(struct perf_event *bp) if (mutex_is_locked(&nr_bp_mutex)) return -1; - return __reserve_bp_slot(bp); + return __reserve_bp_slot(bp, bp->attr.bp_type); } int dbg_release_bp_slot(struct perf_event *bp) @@ -362,7 +362,7 @@ int dbg_release_bp_slot(struct perf_event *bp) if (mutex_is_locked(&nr_bp_mutex)) return -1; - __release_bp_slot(bp); + __release_bp_slot(bp, bp->attr.bp_type); return 0; }
