From: Will Deacon <will.deacon@arm.com>
To: linux-kernel@vger.kernel.org
Cc: peterz@infradead.org, npiggin@gmail.com, linux-mm@kvack.org,
kirill.shutemov@linux.intel.com, akpm@linux-foundation.org,
mhocko@suse.com, aneesh.kumar@linux.vnet.ibm.com
Subject: [PATCH v2 1/5] asm-generic/tlb: Guard with #ifdef CONFIG_MMU
Date: Tue, 4 Sep 2018 12:45:29 +0100 [thread overview]
Message-ID: <1536061533-16188-2-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1536061533-16188-1-git-send-email-will.deacon@arm.com>
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(+)
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 */
--
2.1.4
next prev parent reply other threads:[~2018-09-04 11:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 11:45 [PATCH v2 0/5] Extend and consolidate mmu_gather into new file Will Deacon
2018-09-04 11:45 ` Will Deacon [this message]
2018-09-04 11:45 ` [PATCH v2 2/5] asm-generic/tlb: Track freeing of page-table directories in struct mmu_gather Will Deacon
2018-09-04 11:45 ` [PATCH v2 3/5] asm-generic/tlb: Track which levels of the page tables have been cleared Will Deacon
2018-09-04 11:45 ` [PATCH v2 4/5] mm/memory: Move mmu_gather and TLB invalidation code into its own file Will Deacon
2018-09-04 11:45 ` [PATCH v2 5/5] MAINTAINERS: Add entry for MMU GATHER AND TLB INVALIDATION Will Deacon
2018-09-04 19:55 ` [PATCH v2 0/5] Extend and consolidate mmu_gather into new file Andrew Morton
2018-09-05 12:28 ` Will Deacon
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