7648f42d1a
commit d422c6c0644bccbb1ebeefffa51f35cec3019517 upstream.
When building xway_defconfig with clang:
arch/mips/lantiq/prom.c:82:23: error: array comparison always evaluates
to true [-Werror,-Wtautological-compare]
else if (__dtb_start != __dtb_end)
^
1 error generated.
These are not true arrays, they are linker defined symbols, which are
just addresses. Using the address of operator silences the warning
and does not change the resulting assembly with either clang/ld.lld
or gcc/ld (tested with diff + objdump -Dr). Do the same thing across
the entire MIPS subsystem to ensure there are no more warnings around
this type of comparison.
Link: https://github.com/ClangBuiltLinux/linux/issues/1232
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2013 John Crispin <john@phrozen.org>
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*/
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/sizes.h>
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#include <linux/of_fdt.h>
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#include <linux/kernel.h>
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#include <linux/memblock.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <asm/reboot.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/prom.h>
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#include "common.h"
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__iomem void *rt_sysc_membase;
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__iomem void *rt_memc_membase;
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EXPORT_SYMBOL_GPL(rt_sysc_membase);
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__iomem void *plat_of_remap_node(const char *node)
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{
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struct resource res;
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, node);
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if (!np)
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panic("Failed to find %s node", node);
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if (of_address_to_resource(np, 0, &res))
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panic("Failed to get resource for %s", node);
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if (!request_mem_region(res.start,
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resource_size(&res),
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res.name))
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panic("Failed to request resources for %s", node);
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return ioremap(res.start, resource_size(&res));
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}
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void __init device_tree_init(void)
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{
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unflatten_and_copy_device_tree();
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}
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static int memory_dtb;
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static int __init early_init_dt_find_memory(unsigned long node,
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const char *uname, int depth, void *data)
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{
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if (depth == 1 && !strcmp(uname, "memory@0"))
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memory_dtb = 1;
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return 0;
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}
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void __init plat_mem_setup(void)
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{
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void *dtb = NULL;
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set_io_port_base(KSEG1);
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/*
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* Load the builtin devicetree. This causes the chosen node to be
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* parsed resulting in our memory appearing. fw_passed_dtb is used
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* by CONFIG_MIPS_APPENDED_RAW_DTB as well.
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*/
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if (fw_passed_dtb)
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dtb = (void *)fw_passed_dtb;
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else if (&__dtb_start != &__dtb_end)
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dtb = (void *)__dtb_start;
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__dt_setup_arch(dtb);
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of_scan_flat_dt(early_init_dt_find_memory, NULL);
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if (memory_dtb)
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of_scan_flat_dt(early_init_dt_scan_memory, NULL);
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else if (soc_info.mem_size)
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memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
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else
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detect_memory_region(soc_info.mem_base,
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soc_info.mem_size_min * SZ_1M,
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soc_info.mem_size_max * SZ_1M);
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}
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static int __init plat_of_setup(void)
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{
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__dt_register_buses(soc_info.compatible, "palmbus");
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/* make sure that the reset controller is setup early */
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ralink_rst_init();
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return 0;
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}
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arch_initcall(plat_of_setup);
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