* [PATCH v6 18/19] arm64 : mm: add wrapper function ioremap_prot()
[not found] <20230609075528.9390-1-bhe@redhat.com>
@ 2023-06-09 7:55 ` Baoquan He
2023-06-14 15:14 ` Catalin Marinas
0 siblings, 1 reply; 2+ messages in thread
From: Baoquan He @ 2023-06-09 7:55 UTC (permalink / raw)
To: linux-kernel
Cc: linux-arch, linux-mm, arnd, christophe.leroy, hch, rppt, willy,
agordeev, wangkefeng.wang, schnelle, David.Laight, shorne, deller,
Baoquan He, Catalin Marinas, Will Deacon, linux-arm-kernel
Since hook functions ioremap_allowed() and iounmap_allowed() will be
obsoleted, add wrapper function ioremap_prot() to contain the
specific handling in addition to generic_ioremap_prot() invocation.
Signed-off-by: Baoquan He <bhe@redhat•com>
Reviewed-by: Christoph Hellwig <hch@lst•de>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei•com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel•org>
Cc: Catalin Marinas <catalin.marinas@arm•com>
Cc: Will Deacon <will@kernel•org>
Cc: linux-arm-kernel@lists•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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