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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-07 13:17:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-07 13:17:37 -0700 |
| commit | 8b061610dac3a3b89770c85ad63b481a47b0c38e (patch) | |
| tree | 3ab93ad7f8f3e8bd612cff4e59d55d5a36c0c1fa /include | |
| parent | c2bf807eb347325988b1c7f9139e934ed9b1d795 (diff) | |
| parent | 174a7b1f9692acad7f0ca2b02f696894201a6d94 (diff) | |
| download | linux-8b061610dac3a3b89770c85ad63b481a47b0c38e.tar.bz2 | |
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf tools: Makefile: Use gcc to determine ARCH
perf events, x86: Fix Intel Nehalem and Westmere last level cache event definitions
hw_breakpoints, powerpc: Fix CONFIG_HAVE_HW_BREAKPOINT off-case in ptrace_set_debugreg()
sh, hw_breakpoints: Fix racy access to ptrace breakpoints
arm, hw_breakpoints: Fix racy access to ptrace breakpoints
powerpc, hw_breakpoints: Fix racy access to ptrace breakpoints
x86, hw_breakpoints: Fix racy access to ptrace breakpoints
ptrace: Prepare to fix racy accesses on task breakpoints
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ptrace.h | 13 | ||||
| -rw-r--r-- | include/linux/sched.h | 3 |
2 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index a1147e5dd245..9178d5cc0b01 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -189,6 +189,10 @@ static inline void ptrace_init_task(struct task_struct *child, bool ptrace) child->ptrace = current->ptrace; __ptrace_link(child, current->parent); } + +#ifdef CONFIG_HAVE_HW_BREAKPOINT + atomic_set(&child->ptrace_bp_refcnt, 1); +#endif } /** @@ -350,6 +354,13 @@ extern int task_current_syscall(struct task_struct *target, long *callno, unsigned long args[6], unsigned int maxargs, unsigned long *sp, unsigned long *pc); -#endif +#ifdef CONFIG_HAVE_HW_BREAKPOINT +extern int ptrace_get_breakpoints(struct task_struct *tsk); +extern void ptrace_put_breakpoints(struct task_struct *tsk); +#else +static inline void ptrace_put_breakpoints(struct task_struct *tsk) { } +#endif /* CONFIG_HAVE_HW_BREAKPOINT */ + +#endif /* __KERNEL */ #endif diff --git a/include/linux/sched.h b/include/linux/sched.h index 18d63cea2848..781abd137673 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1537,6 +1537,9 @@ struct task_struct { unsigned long memsw_nr_pages; /* uncharged mem+swap usage */ } memcg_batch; #endif +#ifdef CONFIG_HAVE_HW_BREAKPOINT + atomic_t ptrace_bp_refcnt; +#endif }; /* Future-safe accessor for struct task_struct's cpus_allowed. */ |