linux-kernel - [PATCH] bootwrapper: mspsc.c: fix pointer-to-int-cast warnings

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Date:   Thu,  5 Oct 2017 13:28:54 +0200
From:   Michal Suchanek <msuchanek@...e.de>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Suchanek <msuchanek@...e.de>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] bootwrapper: mspsc.c: fix pointer-to-int-cast warnings

I get these warnings:

../arch/powerpc/boot/mpsc.c: In function 'mpsc_get_virtreg_of_phandle':
../arch/powerpc/boot/mpsc.c:113:35: warning: cast from pointer to
integer of different size [-Wpointer-to-int-cast]

../arch/powerpc/boot/mpsc.c: In function 'mpsc_console_init':
../arch/powerpc/boot/mpsc.c:147:12: warning: cast from pointer to
integer of different size [-Wpointer-to-int-cast]

Presumably the patch below fixes these, and presumably the DT defines
that pointes and integers have the same size in the DT so this is fine
regardless of 32bit/64bit target. I have not found a DT definition for
PowerPC, howewer. So any bugs in the property sizing and resulting
failures to read the properties are left as before.

Signed-off-by: Michal Suchanek <msuchanek@...e.de>
---
 arch/powerpc/boot/mpsc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/boot/mpsc.c b/arch/powerpc/boot/mpsc.c
index 425ad88cce8d..ea740493277a 100644
--- a/arch/powerpc/boot/mpsc.c
+++ b/arch/powerpc/boot/mpsc.c
@@ -110,7 +110,7 @@ static volatile char *mpsc_get_virtreg_of_phandle(void *devp, char *prop)
 	if (n != sizeof(v))
 		goto err_out;
 
-	devp = find_node_by_linuxphandle((u32)v);
+	devp = find_node_by_linuxphandle((intptr_t)v);
 	if (devp == NULL)
 		goto err_out;
 
@@ -144,7 +144,7 @@ int mpsc_console_init(void *devp, struct serial_console_data *scdp)
 	n = getprop(devp, "cell-index", &v, sizeof(v));
 	if (n != sizeof(v))
 		goto err_out;
-	reg_set = (int)v;
+	reg_set = (intptr_t)v;
 
 	mpscintr_base += (reg_set == 0) ? 0x4 : 0xc;
 
-- 
2.10.2