linux-kernel - [PATCH 2/2] mm/early_ioremap: declare early_memremap_pgprot

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Message-Id: <20220314165724.16071-2-vbabka@suse.cz>
Date:   Mon, 14 Mar 2022 17:57:24 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Mel Gorman <mgorman@...hsingularity.net>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: [PATCH 2/2] mm/early_ioremap: declare early_memremap_pgprot_adjust()

The mm/ directory can almost fully be built with W=1, which would help
in local development. One remaining issue is missing prototype for
early_memremap_pgprot_adjust().

Thus add a declaration for this function. Use mm/internal.h instead of
asm/early_ioremap.h to avoid missing type definitions and unnecessary
exposure.

Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
 mm/early_ioremap.c | 1 +
 mm/internal.h      | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c
index 74984c23a87e..9bc12e526ed0 100644
--- a/mm/early_ioremap.c
+++ b/mm/early_ioremap.c
@@ -17,6 +17,7 @@
 #include <linux/vmalloc.h>
 #include <asm/fixmap.h>
 #include <asm/early_ioremap.h>
+#include "internal.h"
 
 #ifdef CONFIG_MMU
 static int early_ioremap_debug __initdata;
diff --git a/mm/internal.h b/mm/internal.h
index d80300392a19..e3e2a3c5f655 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -154,6 +154,12 @@ extern unsigned long highest_memmap_pfn;
  */
 #define MAX_RECLAIM_RETRIES 16
 
+/*
+ * in mm/early_ioremap.c
+ */
+pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr,
+					unsigned long size, pgprot_t prot);
+
 /*
  * in mm/vmscan.c:
  */
-- 
2.35.1