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authorIngo Molnar <mingo@elte.hu>2009-11-21 14:07:23 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-21 14:07:23 +0100
commit96200591a34f8ecb98481c626125df43a2463b55 (patch)
tree314c376b01f254d04f9aaf449b1f9147ad177fa6 /arch/x86/kernel/process_64.c
parent7031281e02bf951a2259849217193fb9d75a9762 (diff)
parent68efa37df779b3e04280598e8b5b3a1919b65fee (diff)
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.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index eb62cbcaa49..70cf15873f3 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;
}