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| author |   Kirill Tkhai <tkhai@yandex.ru> | 2013-09-14 16:02:11 +0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-11-14 14:57:21 -0800 |
| commit | 812cb83a56a908729c453a7db3fb2c262119bc9d (patch) | |
| tree | 3fdf3df047276db7de85558ff6caff006c3b1cc4 /arch/sparc/kernel/signal_64.c | |
| parent | sparc64: Add self-IPI support for smp_send_reschedule() (diff) | |
| download | wireguard-linux-812cb83a56a908729c453a7db3fb2c262119bc9d.tar.xz wireguard-linux-812cb83a56a908729c453a7db3fb2c262119bc9d.zip | |
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.c | 13 |
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(); } |