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-rw-r--r--include/asm-generic/pgtable.h21
1 files changed, 11 insertions, 10 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 8e6d0ca70aba..922f03671dd8 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -280,17 +280,18 @@ static inline void ptep_modify_prot_commit(struct mm_struct *mm,
280#endif 280#endif
281 281
282/* 282/*
283 * A facility to provide batching of the reload of page tables with the 283 * A facility to provide batching of the reload of page tables and
284 * actual context switch code for paravirtualized guests. By convention, 284 * other process state with the actual context switch code for
285 * only one of the lazy modes (CPU, MMU) should be active at any given 285 * paravirtualized guests. By convention, only one of the batched
286 * time, entry should never be nested, and entry and exits should always 286 * update (lazy) modes (CPU, MMU) should be active at any given time,
287 * be paired. This is for sanity of maintaining and reasoning about the 287 * entry should never be nested, and entry and exits should always be
288 * kernel code. 288 * paired. This is for sanity of maintaining and reasoning about the
289 * kernel code. In this case, the exit (end of the context switch) is
290 * in architecture-specific code, and so doesn't need a generic
291 * definition.
289 */ 292 */
290#ifndef __HAVE_ARCH_ENTER_LAZY_CPU_MODE 293#ifndef __HAVE_ARCH_START_CONTEXT_SWITCH
291#define arch_enter_lazy_cpu_mode() do {} while (0) 294#define arch_start_context_switch() do {} while (0)
292#define arch_leave_lazy_cpu_mode() do {} while (0)
293#define arch_flush_lazy_cpu_mode() do {} while (0)
294#endif 295#endif
295 296
296#ifndef __HAVE_PFNMAP_TRACKING 297#ifndef __HAVE_PFNMAP_TRACKING