linux-stable/arch/hexagon/lib/io.c
Nathan Chancellor 8997bb6d1e hexagon: export raw I/O routines for modules
commit ffb92ce826 upstream.

Patch series "Fixes for ARCH=hexagon allmodconfig", v2.

This series fixes some issues noticed with ARCH=hexagon allmodconfig.

This patch (of 3):

When building ARCH=hexagon allmodconfig, the following errors occur:

  ERROR: modpost: "__raw_readsl" [drivers/i3c/master/svc-i3c-master.ko] undefined!
  ERROR: modpost: "__raw_writesl" [drivers/i3c/master/dw-i3c-master.ko] undefined!
  ERROR: modpost: "__raw_readsl" [drivers/i3c/master/dw-i3c-master.ko] undefined!
  ERROR: modpost: "__raw_writesl" [drivers/i3c/master/i3c-master-cdns.ko] undefined!
  ERROR: modpost: "__raw_readsl" [drivers/i3c/master/i3c-master-cdns.ko] undefined!

Export these symbols so that modules can use them without any errors.

Link: https://lkml.kernel.org/r/20211115174250.1994179-1-nathan@kernel.org
Link: https://lkml.kernel.org/r/20211115174250.1994179-2-nathan@kernel.org
Fixes: 013bf24c38 ("Hexagon: Provide basic implementation and/or stubs for I/O routines.")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Brian Cain <bcain@codeaurora.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-11-26 10:47:21 +01:00

82 lines
1.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* I/O access functions for Hexagon
*
* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
*/
#include <asm/io.h>
/* These are all FIFO routines! */
/*
* __raw_readsw - read words a short at a time
* @addr: source address
* @data: data address
* @len: number of shorts to read
*/
void __raw_readsw(const void __iomem *addr, void *data, int len)
{
const volatile short int *src = (short int *) addr;
short int *dst = (short int *) data;
if ((u32)data & 0x1)
panic("unaligned pointer to readsw");
while (len-- > 0)
*dst++ = *src;
}
EXPORT_SYMBOL(__raw_readsw);
/*
* __raw_writesw - read words a short at a time
* @addr: source address
* @data: data address
* @len: number of shorts to read
*/
void __raw_writesw(void __iomem *addr, const void *data, int len)
{
const short int *src = (short int *)data;
volatile short int *dst = (short int *)addr;
if ((u32)data & 0x1)
panic("unaligned pointer to writesw");
while (len-- > 0)
*dst = *src++;
}
EXPORT_SYMBOL(__raw_writesw);
/* Pretty sure len is pre-adjusted for the length of the access already */
void __raw_readsl(const void __iomem *addr, void *data, int len)
{
const volatile long *src = (long *) addr;
long *dst = (long *) data;
if ((u32)data & 0x3)
panic("unaligned pointer to readsl");
while (len-- > 0)
*dst++ = *src;
}
EXPORT_SYMBOL(__raw_readsl);
void __raw_writesl(void __iomem *addr, const void *data, int len)
{
const long *src = (long *)data;
volatile long *dst = (long *)addr;
if ((u32)data & 0x3)
panic("unaligned pointer to writesl");
while (len-- > 0)
*dst = *src++;
}
EXPORT_SYMBOL(__raw_writesl);