[PATCH RT 1/7] x86/32: Use kmap switch for non highmem as well
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2013-02-19 03:56:51
Also in:
lkml
Subsystem:
scheduler, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot, Linus Torvalds, Thomas Gleixner, Borislav Petkov, Dave Hansen
From: Thomas Gleixner <redacted> Even with CONFIG_HIGHMEM=n we need to take care of the "atomic" mappings which are installed via iomap_atomic. Signed-off-by: Thomas Gleixner <redacted> Cc: stable-rt@vger.kernel.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- arch/x86/kernel/process_32.c | 2 +- include/linux/sched.h | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 20f1573..66ee590 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c@@ -340,7 +340,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT)) __switch_to_xtra(prev_p, next_p, tss); -#if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM +#ifdef CONFIG_PREEMPT_RT_FULL /* * Save @prev's kmap_atomic stack */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index e2f9e3b..a26bd7e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h@@ -1608,9 +1608,11 @@ struct task_struct { struct rcu_head put_rcu; int softirq_nestcnt; #endif -#if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM +#ifdef CONFIG_PREEMPT_RT_FULL +# if defined CONFIG_HIGHMEM || defined CONFIG_X86_32 int kmap_idx; pte_t kmap_pte[KM_TYPE_NR]; +# endif #endif #ifdef CONFIG_DEBUG_PREEMPT
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1.7.10.4