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authorKirill Tkhai <tkhai@yandex.ru>2013-09-14 16:02:11 +0400
committerDavid S. Miller <davem@davemloft.net>2013-11-14 14:57:21 -0800
commit812cb83a56a908729c453a7db3fb2c262119bc9d (patch)
tree3fdf3df047276db7de85558ff6caff006c3b1cc4 /arch/sparc/kernel/signal_64.c
parent1a36265bf7d7e16b35fab5ae7f2f5d499bd0c14d (diff)
downloadlinux-812cb83a56a908729c453a7db3fb2c262119bc9d.tar.bz2
sparc64: Implement HAVE_CONTEXT_TRACKING
Mark the places when the system are in user or are in kernel. This is used to make full dynticks system (tickless) -- CONFIG_NO_HZ_FULL dependence. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> CC: David Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/signal_64.c')
-rw-r--r--arch/sparc/kernel/signal_64.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index 35923e8abd82..cd91d010e6d3 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -23,6 +23,7 @@
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/bitops.h>
+#include <linux/context_tracking.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
@@ -43,6 +44,7 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
{
struct ucontext __user *ucp = (struct ucontext __user *)
regs->u_regs[UREG_I0];
+ enum ctx_state prev_state = exception_enter();
mc_gregset_t __user *grp;
unsigned long pc, npc, tstate;
unsigned long fp, i7;
@@ -129,16 +131,19 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
}
if (err)
goto do_sigsegv;
-
+out:
+ exception_exit(prev_state);
return;
do_sigsegv:
force_sig(SIGSEGV, current);
+ goto out;
}
asmlinkage void sparc64_get_context(struct pt_regs *regs)
{
struct ucontext __user *ucp = (struct ucontext __user *)
regs->u_regs[UREG_I0];
+ enum ctx_state prev_state = exception_enter();
mc_gregset_t __user *grp;
mcontext_t __user *mcp;
unsigned long fp, i7;
@@ -220,10 +225,12 @@ asmlinkage void sparc64_get_context(struct pt_regs *regs)
}
if (err)
goto do_sigsegv;
-
+out:
+ exception_exit(prev_state);
return;
do_sigsegv:
force_sig(SIGSEGV, current);
+ goto out;
}
struct rt_signal_frame {
@@ -528,11 +535,13 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
{
+ user_exit();
if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs, orig_i0);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
}
+ user_enter();
}