mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 14:06:43 +07:00
a7e89326b4
Commitf51246efee("MIPS: Get rid of finish_arch_switch().") moved the __restore_watch() call from finish_arch_switch() (i.e. after resume() returns) to before the resume() call in switch_to(). This results in watchpoints only being restored when a task is descheduled, preventing the watchpoints from being effective most of the time, except due to chance before the watchpoints are lazily removed. Fix the call sequence from switch_to() through to mips_install_watch_registers() to pass the task_struct pointer of the next task, instead of using current. This allows the watchpoints for the next (non-current) task to be restored without reintroducing finish_arch_switch(). Fixes:f51246efee("MIPS: Get rid of finish_arch_switch().") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 4.3.x- Patchwork: https://patchwork.linux-mips.org/patch/12726/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
33 lines
827 B
C
33 lines
827 B
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2008 David Daney
|
|
*/
|
|
#ifndef _ASM_WATCH_H
|
|
#define _ASM_WATCH_H
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
#include <asm/mipsregs.h>
|
|
|
|
void mips_install_watch_registers(struct task_struct *t);
|
|
void mips_read_watch_registers(void);
|
|
void mips_clear_watch_registers(void);
|
|
void mips_probe_watch_registers(struct cpuinfo_mips *c);
|
|
|
|
#ifdef CONFIG_HARDWARE_WATCHPOINTS
|
|
#define __restore_watch(task) do { \
|
|
if (unlikely(test_bit(TIF_LOAD_WATCH, \
|
|
&task_thread_info(task)->flags))) { \
|
|
mips_install_watch_registers(task); \
|
|
} \
|
|
} while (0)
|
|
|
|
#else
|
|
#define __restore_watch(task) do {} while (0)
|
|
#endif
|
|
|
|
#endif /* _ASM_WATCH_H */
|