linux-kernel - [PATCH 4/7] hexagon: asm/io.h: Expect immutable pointer in virt_to

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Message-ID: <168155746272.13678.16103862954212080276.stgit@skinsburskii.localdomain>
Date:   Sat, 15 Apr 2023 04:17:42 -0700
From:   Stanislav Kinsburskii <skinsburskii@...ux.microsoft.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Stanislav Kinsburskii <stanislav.kinsburskii@...il.com>,
        Brian Cain <bcain@...cinc.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mark Brown <broonie@...nel.org>, linux-hexagon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] hexagon: asm/io.h: Expect immutable pointer in
 virt_to_phys prototype

From: Stanislav Kinsburskii <stanislav.kinsburskii@...il.com>

These helper function - virt_to_phys - doesn't need the address pointer to
be mutable.

In the same time expecting it to be mutable leads to the following build
warning for constant pointers:

  warning: passing argument 1 of ‘virt_to_phys’ discards ‘const’ qualifier from pointer target type

Signed-off-by: Stanislav Kinsburskii <stanislav.kinsburskii@...il.com>
CC: Brian Cain <bcain@...cinc.com>
CC: Linus Walleij <linus.walleij@...aro.org>
CC: Mark Brown <broonie@...nel.org>
CC: linux-hexagon@...r.kernel.org
CC: linux-kernel@...r.kernel.org
---
 arch/hexagon/include/asm/io.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h
index 46a099de85b7..facbd7467dd3 100644
--- a/arch/hexagon/include/asm/io.h
+++ b/arch/hexagon/include/asm/io.h
@@ -46,7 +46,7 @@ extern void __raw_writesl(void __iomem *addr, const void *data, int wordlen);
  * virt_to_phys - map virtual address to physical
  * @address:  address to map
  */
-static inline unsigned long virt_to_phys(volatile void *address)
+static inline unsigned long virt_to_phys(const volatile void *address)
 {
 	return __pa(address);
 }