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arch/tile: move user_exit() to early kernel entry sequence

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This ensures that we always notify context tracking that we
have exited from user space no matter how we enter the kernel.
It is similar to how arm64 handles context tracking, for example.

This allows the removal of all the exception_enter() calls that
were added in commit 49e4e15619 ("tile: support CONTEXT_TRACKING and
thus NOHZ_FULL").

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
This commit is contained in:
Chris Metcalf
2015-12-23 17:13:04 -05:00
parent 9ce815ed50
commit 1bb50cad45
7 changed files with 16 additions and 41 deletions
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3
arch/tile/mm/fault.c
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@@ -35,7 +35,6 @@
#include <linux/syscalls.h>
#include <linux/uaccess.h>
#include <linux/kdebug.h>
#include <linux/context_tracking.h>
#include <asm/pgalloc.h>
#include <asm/sections.h>
@@ -845,9 +844,7 @@ static inline void __do_page_fault(struct pt_regs *regs, int fault_num,
void do_page_fault(struct pt_regs *regs, int fault_num,
unsigned long address, unsigned long write)
{
enum ctx_state prev_state = exception_enter();
__do_page_fault(regs, fault_num, address, write);
exception_exit(prev_state);
}
#if CHIP_HAS_TILE_DMA()