[PATCH 5.10 40/91] arc: iounmap() arg is volatile

[PATCH 5.10 40/91] arc: iounmap() arg is volatile

[Greg Kroah-Hartman]

From: Randy Dunlap <rdunlap@infradead.org>

[ Upstream commit c44f15c1c09481d50fd33478ebb5b8284f8f5edb ]

Add 'volatile' to iounmap()'s argument to prevent build warnings.
This make it the same as other major architectures.

Placates these warnings: (12 such warnings)

../drivers/video/fbdev/riva/fbdev.c: In function 'rivafb_probe':
../drivers/video/fbdev/riva/fbdev.c:2067:42: error: passing argument 1 of 'iounmap' discards 'volatile' qualifier from pointer target type [-Werror=discarded-qualifiers]
 2067 |                 iounmap(default_par->riva.PRAMIN);

Fixes: 1162b0701b14b ("ARC: I/O and DMA Mappings")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: linux-snps-arc@lists.infradead.org
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arc/include/asm/io.h | 2 +-
 arch/arc/mm/ioremap.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
index 8f777d6441a5..80347382a380 100644
--- a/arch/arc/include/asm/io.h
+++ b/arch/arc/include/asm/io.h
@@ -32,7 +32,7 @@ static inline void ioport_unmap(void __iomem *addr)
 {
 }
 
-extern void iounmap(const void __iomem *addr);
+extern void iounmap(const volatile void __iomem *addr);
 
 /*
  * io{read,write}{16,32}be() macros
diff --git a/arch/arc/mm/ioremap.c b/arch/arc/mm/ioremap.c
index 95c649fbc95a..d3b1ea16e9cd 100644
--- a/arch/arc/mm/ioremap.c
+++ b/arch/arc/mm/ioremap.c
@@ -93,7 +93,7 @@ void __iomem *ioremap_prot(phys_addr_t paddr, unsigned long size,
 EXPORT_SYMBOL(ioremap_prot);
 
 
-void iounmap(const void __iomem *addr)
+void iounmap(const volatile void __iomem *addr)
 {
 	/* weird double cast to handle phys_addr_t > 32 bits */
 	if (arc_uncached_addr_space((phys_addr_t)(u32)addr))
-- 
2.35.1




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