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[v2,1/5] asm-generic/tlb: Guard with #ifdef CONFIG_MMU

Message ID 1536061533-16188-2-git-send-email-will.deacon@arm.com
State New
Headers show
Series Extend and consolidate mmu_gather into new file | expand

Commit Message

Will Deacon Sept. 4, 2018, 11:45 a.m. UTC 
The inner workings of the mmu_gather-based TLB invalidation mechanism
are not relevant to nommu configurations, so guard them with an #ifdef.
This allows us to implement future functions using static inlines
without breaking the build.

Acked-by: Nicholas Piggin <npiggin@gmail.com>

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

Signed-off-by: Will Deacon <will.deacon@arm.com>

---
 include/asm-generic/tlb.h | 4 ++++
 1 file changed, 4 insertions(+)

-- 
2.1.4
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Patch

diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index b3353e21f3b3..a25e236f7a7f 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -20,6 +20,8 @@ 
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
+#ifdef CONFIG_MMU
+
 #ifdef CONFIG_HAVE_RCU_TABLE_FREE
 /*
  * Semi RCU freeing of the page directories.
@@ -310,6 +312,8 @@  static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
 #endif
 #endif
 
+#endif /* CONFIG_MMU */
+
 #define tlb_migrate_finish(mm) do {} while (0)
 
 #endif /* _ASM_GENERIC__TLB_H */