linux-kernel - [PATCH] sh: clk: Fix assignment from incompatible pointer type for ioreadX()

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Date:   Thu, 23 Jul 2020 10:20:17 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] sh: clk: Fix assignment from incompatible pointer type for ioreadX()

The ioreadX() helpers accept now pointer to const memory so declaration
of read function needs updating.

This fixes build errors like:

    drivers/sh/clk/cpg.c: In function ‘sh_clk_mstp_enable’:
    drivers/sh/clk/cpg.c:49:9: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
        read = ioread8;

Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

---

Dear Andrew,

This was part of my v3 patchset commit 9ab7fb303cc1 ("iomap: Constify
ioreadX() iomem argument (as in generic implementation)") but I think it
was skipped when applying to your tree.

Maybe because it depends on commit 58c4d8659186 ("sh: clkfwk: remove
r8/r16/r32") which landed later?  Anyway it should go through your tree,
I think.
---
 drivers/sh/clk/cpg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/sh/clk/cpg.c b/drivers/sh/clk/cpg.c
index a5cacfe24a42..fd72d9088bdc 100644
--- a/drivers/sh/clk/cpg.c
+++ b/drivers/sh/clk/cpg.c
@@ -40,7 +40,7 @@ static int sh_clk_mstp_enable(struct clk *clk)
 {
 	sh_clk_write(sh_clk_read(clk) & ~(1 << clk->enable_bit), clk);
 	if (clk->status_reg) {
-		unsigned int (*read)(void __iomem *addr);
+		unsigned int (*read)(const void __iomem *addr);
 		int i;
 		void __iomem *mapped_status = (phys_addr_t)clk->status_reg -
 			(phys_addr_t)clk->enable_reg + clk->mapped_reg;
-- 
2.17.1