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| author |   Ingo Molnar <mingo@elte.hu> | 2009-11-21 14:07:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-21 14:07:23 +0100 |
| commit | 96200591a34f8ecb98481c626125df43a2463b55 (patch) | |
| tree | 314c376b01f254d04f9aaf449b1f9147ad177fa6 /arch/x86/kernel/process_64.c | |
| parent | Merge branch 'perf/urgent' into perf/core (diff) | |
| parent | hw-breakpoints, x86: Fix modular KVM build (diff) | |
| download | linux-dev-96200591a34f8ecb98481c626125df43a2463b55.tar.xz linux-dev-96200591a34f8ecb98481c626125df43a2463b55.zip | |
Merge branch 'tracing/hw-breakpoints' into perf/core
Conflicts:
arch/x86/kernel/kprobes.c
kernel/trace/Makefile
Merge reason: hw-breakpoints perf integration is looking
good in testing and in reviews, plus conflicts
are mounting up - so merge & resolve.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index eb62cbcaa490..70cf15873f3d 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -52,6 +52,7 @@ #include <asm/idle.h> #include <asm/syscalls.h> #include <asm/ds.h> +#include <asm/debugreg.h> asmlinkage extern void ret_from_fork(void); @@ -297,12 +298,16 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.fs = me->thread.fs; p->thread.gs = me->thread.gs; + p->thread.io_bitmap_ptr = NULL; savesegment(gs, p->thread.gsindex); savesegment(fs, p->thread.fsindex); savesegment(es, p->thread.es); savesegment(ds, p->thread.ds); + err = -ENOMEM; + memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); + if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) { p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL); if (!p->thread.io_bitmap_ptr) { @@ -341,6 +346,7 @@ out: kfree(p->thread.io_bitmap_ptr); p->thread.io_bitmap_max = 0; } + return err; } @@ -495,6 +501,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) */ if (preload_fpu) __math_state_restore(); + return prev_p; } |