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Message-Id: <20230620131356.25440-19-bhe@redhat.com>
Date: Tue, 20 Jun 2023 21:13:55 +0800
From: Baoquan He <bhe@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-arch@...r.kernel.org, linux-mm@...ck.org, arnd@...db.de,
hch@....de, christophe.leroy@...roup.eu, rppt@...nel.org,
willy@...radead.org, agordeev@...ux.ibm.com,
wangkefeng.wang@...wei.com, schnelle@...ux.ibm.com,
David.Laight@...LAB.COM, shorne@...il.com, deller@....de,
nathan@...nel.org, glaubitz@...sik.fu-berlin.de,
Baoquan He <bhe@...hat.com>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v7 18/19] arm64 : mm: add wrapper function ioremap_prot()
Since hook functions ioremap_allowed() and iounmap_allowed() will be
obsoleted, add wrapper function ioremap_prot() to contain the
the specific handling in addition to generic_ioremap_prot() invocation.
Signed-off-by: Baoquan He <bhe@...hat.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Reviewed-by: Kefeng Wang <wangkefeng.wang@...wei.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>
Acked-by: Catalin Marinas <catalin.marinas@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
---
arch/arm64/include/asm/io.h | 3 +--
arch/arm64/mm/ioremap.c | 10 ++++++----
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 877495a0fd0c..97dd4ff1253b 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -139,8 +139,7 @@ extern void __memset_io(volatile void __iomem *, int, size_t);
* I/O memory mapping functions.
*/
-bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long prot);
-#define ioremap_allowed ioremap_allowed
+#define ioremap_prot ioremap_prot
#define _PAGE_IOREMAP PROT_DEVICE_nGnRE
diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c
index c5af103d4ad4..269f2f63ab7d 100644
--- a/arch/arm64/mm/ioremap.c
+++ b/arch/arm64/mm/ioremap.c
@@ -3,20 +3,22 @@
#include <linux/mm.h>
#include <linux/io.h>
-bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long prot)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+ unsigned long prot)
{
unsigned long last_addr = phys_addr + size - 1;
/* Don't allow outside PHYS_MASK */
if (last_addr & ~PHYS_MASK)
- return false;
+ return NULL;
/* Don't allow RAM to be mapped. */
if (WARN_ON(pfn_is_map_memory(__phys_to_pfn(phys_addr))))
- return false;
+ return NULL;
- return true;
+ return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
}
+EXPORT_SYMBOL(ioremap_prot);
/*
* Must be called after early_fixmap_init
--
2.34.1
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