From 46a6e0cf1c6665a8e867d8f7798d7a3538633f03 Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Sun, 7 Jun 2015 11:37:02 -0700 Subject: x86/mpx: Clean up the code by not passing a task pointer around when unnecessary The MPX code can only work on the current task. You can not, for instance, enable MPX management in another process or thread. You can also not handle a fault for another process or thread. Despite this, we pass a task_struct around prolifically. This patch removes all of the task struct passing for code paths where the code can not deal with another task (which turns out to be all of them). This has no functional changes. It's just a cleanup. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner Cc: Andrew Morton Cc: Dave Hansen Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: bp@alien8.de Link: http://lkml.kernel.org/r/20150607183702.6A81DA2C@viggo.jf.intel.com Signed-off-by: Ingo Molnar --- arch/x86/include/asm/processor.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/x86/include/asm/processor.h') diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 8e04f51d6bea..53dbd2b4f1d8 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -802,18 +802,18 @@ extern int get_tsc_mode(unsigned long adr); extern int set_tsc_mode(unsigned int val); /* Register/unregister a process' MPX related resource */ -#define MPX_ENABLE_MANAGEMENT(tsk) mpx_enable_management((tsk)) -#define MPX_DISABLE_MANAGEMENT(tsk) mpx_disable_management((tsk)) +#define MPX_ENABLE_MANAGEMENT() mpx_enable_management() +#define MPX_DISABLE_MANAGEMENT() mpx_disable_management() #ifdef CONFIG_X86_INTEL_MPX -extern int mpx_enable_management(struct task_struct *tsk); -extern int mpx_disable_management(struct task_struct *tsk); +extern int mpx_enable_management(void); +extern int mpx_disable_management(void); #else -static inline int mpx_enable_management(struct task_struct *tsk) +static inline int mpx_enable_management(void) { return -EINVAL; } -static inline int mpx_disable_management(struct task_struct *tsk) +static inline int mpx_disable_management(void) { return -EINVAL; } -- cgit v1.2.3