From 2f0993e0fb663c49e4d1e02654f6203246be4817 Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Sat, 5 Dec 2009 07:06:10 +0100 Subject: [PATCH] hw-breakpoints: Drop callback and task parameters from modify helper Drop the callback and task parameters from modify_user_hw_breakpoint(). For now we have no user that need to modify a breakpoint to the point of changing its handler or its task context. Signed-off-by: Frederic Weisbecker Cc: "K. Prasad" --- arch/x86/kernel/ptrace.c | 4 ++-- include/linux/hw_breakpoint.h | 9 ++------- kernel/hw_breakpoint.c | 7 +++---- 3 files changed, 7 insertions(+), 13 deletions(-) diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index 04d182a7cfdbd..dbb395572ae2b 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -618,7 +618,7 @@ ptrace_modify_breakpoint(struct perf_event *bp, int len, int type, attr.bp_type = gen_type; attr.disabled = disabled; - return modify_user_hw_breakpoint(bp, &attr, bp->callback, tsk); + return modify_user_hw_breakpoint(bp, &attr); } /* @@ -740,7 +740,7 @@ static int ptrace_set_breakpoint_addr(struct task_struct *tsk, int nr, attr = bp->attr; attr.bp_addr = addr; - bp = modify_user_hw_breakpoint(bp, &attr, bp->callback, tsk); + bp = modify_user_hw_breakpoint(bp, &attr); } /* * CHECKME: the previous code returned -EIO if the addr wasn't a diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h index a03daed08c59e..d33096e0dbd49 100644 --- a/include/linux/hw_breakpoint.h +++ b/include/linux/hw_breakpoint.h @@ -57,10 +57,7 @@ register_user_hw_breakpoint(struct perf_event_attr *attr, /* FIXME: only change from the attr, and don't unregister */ extern struct perf_event * -modify_user_hw_breakpoint(struct perf_event *bp, - struct perf_event_attr *attr, - perf_callback_t triggered, - struct task_struct *tsk); +modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr); /* * Kernel breakpoints are not associated with any particular thread. @@ -97,9 +94,7 @@ register_user_hw_breakpoint(struct perf_event_attr *attr, struct task_struct *tsk) { return NULL; } static inline struct perf_event * modify_user_hw_breakpoint(struct perf_event *bp, - struct perf_event_attr *attr, - perf_callback_t triggered, - struct task_struct *tsk) { return NULL; } + struct perf_event_attr *attr) { return NULL; } static inline struct perf_event * register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, perf_callback_t triggered, diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c index cf5ee1628411c..2d10b012828f0 100644 --- a/kernel/hw_breakpoint.c +++ b/kernel/hw_breakpoint.c @@ -312,9 +312,7 @@ EXPORT_SYMBOL_GPL(register_user_hw_breakpoint); * @tsk: pointer to 'task_struct' of the process to which the address belongs */ struct perf_event * -modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr, - perf_callback_t triggered, - struct task_struct *tsk) +modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr) { /* * FIXME: do it without unregistering @@ -323,7 +321,8 @@ modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr, */ unregister_hw_breakpoint(bp); - return perf_event_create_kernel_counter(attr, -1, tsk->pid, triggered); + return perf_event_create_kernel_counter(attr, -1, bp->ctx->task->pid, + bp->callback); } EXPORT_SYMBOL_GPL(modify_user_hw_breakpoint); -- 2.39.5