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[V1,02/10] arch/xtensa: Move kmap build bug out of the way

Message ID 20200430203845.582900-3-ira.weiny@intel.com
State New
Headers show
Series Remove duplicated kmap code | expand

Commit Message

Ira Weiny April 30, 2020, 8:38 p.m. UTC 
From: Ira Weiny <ira.weiny@intel.com>

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

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 arch/xtensa/include/asm/highmem.h | 5 -----
 arch/xtensa/mm/highmem.c          | 5 +++++
 2 files changed, 5 insertions(+), 5 deletions(-)

Comments

Christoph Hellwig May 1, 2020, 8:36 a.m. UTC | #1 
On Thu, Apr 30, 2020 at 01:38:37PM -0700, ira.weiny@intel.com wrote:
> @@ -88,6 +88,11 @@ 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);

This can fit on a single line.  Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

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..711641c4d214 100644
--- a/arch/xtensa/mm/highmem.c
+++ b/arch/xtensa/mm/highmem.c
@@ -88,6 +88,11 @@  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);