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From:   ira.weiny@intel.com
To:     linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Christian Koenig <christian.koenig@amd.com>,
        Huang Rui <ray.huang@amd.com>
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        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
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Subject: [PATCH V2 02/11] arch/xtensa: Move kmap build bug out of the way
Date:   Sun,  3 May 2020 18:09:03 -0700
Message-Id: <20200504010912.982044-3-ira.weiny@intel.com>
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From: Ira Weiny <ira.weiny@intel.com>

Move the kmap() build bug to kmap_init() to facilitate patches to lift
kmap() to the core.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

---
Changes from V1:
	combine code onto 1 line.
---
 arch/xtensa/include/asm/highmem.h | 5 -----
 arch/xtensa/mm/highmem.c          | 4 ++++
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/xtensa/include/asm/highmem.h b/arch/xtensa/include/asm/highmem.h
index 413848cc1e56..a9587c85be85 100644
--- a/arch/xtensa/include/asm/highmem.h
+++ b/arch/xtensa/include/asm/highmem.h
@@ -68,11 +68,6 @@ void kunmap_high(struct page *page);
 
 static inline void *kmap(struct page *page)
 {
-	/* Check if this memory layout is broken because PKMAP overlaps
-	 * page table.
-	 */
-	BUILD_BUG_ON(PKMAP_BASE <
-		     TLBTEMP_BASE_1 + TLBTEMP_SIZE);
 	might_sleep();
 	if (!PageHighMem(page))
 		return page_address(page);
diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c
index 184ceadccc1a..da734a2ed641 100644
--- a/arch/xtensa/mm/highmem.c
+++ b/arch/xtensa/mm/highmem.c
@@ -88,6 +88,10 @@ void __init kmap_init(void)
 {
 	unsigned long kmap_vstart;
 
+	/* Check if this memory layout is broken because PKMAP overlaps
+	 * page table.
+	 */
+	BUILD_BUG_ON(PKMAP_BASE < TLBTEMP_BASE_1 + TLBTEMP_SIZE);
 	/* cache the first kmap pte */
 	kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
 	kmap_pte = kmap_get_fixmap_pte(kmap_vstart);
-- 
2.25.1