From 49e4e15619cd7cd9fc275d460fae2a95c1337fcc Mon Sep 17 00:00:00 2001 From: Chris Metcalf Date: Mon, 23 Mar 2015 14:23:58 -0400 Subject: tile: support CONTEXT_TRACKING and thus NOHZ_FULL Add the TIF_NOHZ flag appropriately. Add call to user_exit() on entry to do_work_pending() and on entry to syscalls via do_syscall_trace_enter(), and also the top of do_syscall_trace_exit() just because it's done in x86. Add call to user_enter() at the bottom of do_work_pending() once we have no more work to do before returning to userspace. Wrap all the trap code in exception_enter() / exception_exit(). Signed-off-by: Chris Metcalf Acked-by: Frederic Weisbecker --- arch/tile/mm/fault.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'arch/tile/mm/fault.c') diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index 0f61a73534e6..e83cc999da02 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include @@ -702,6 +703,7 @@ void do_page_fault(struct pt_regs *regs, int fault_num, unsigned long address, unsigned long write) { int is_page_fault; + enum ctx_state prev_state = exception_enter(); #ifdef CONFIG_KPROBES /* @@ -711,7 +713,7 @@ void do_page_fault(struct pt_regs *regs, int fault_num, */ if (notify_die(DIE_PAGE_FAULT, "page fault", regs, -1, regs->faultnum, SIGSEGV) == NOTIFY_STOP) - return; + goto done; #endif #ifdef __tilegx__ @@ -750,7 +752,6 @@ void do_page_fault(struct pt_regs *regs, int fault_num, current->comm, current->pid, pc, address); show_regs(regs); do_group_exit(SIGKILL); - return; } } #else @@ -834,12 +835,15 @@ void do_page_fault(struct pt_regs *regs, int fault_num, async->is_fault = is_page_fault; async->is_write = write; async->address = address; - return; + goto done; } } #endif handle_page_fault(regs, fault_num, is_page_fault, address, write); + +done: + exception_exit(prev_state); } -- cgit v1.2.3