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8a7f97b902
Add check for the return value of memblock_alloc*() functions and call
panic() in case of error. The panic message repeats the one used by
panicing memblock allocators with adjustment of parameters to include
only relevant ones.
The replacement was mostly automated with semantic patches like the one
below with manual massaging of format strings.
@@
expression ptr, size, align;
@@
ptr = memblock_alloc(size, align);
+ if (!ptr)
+ panic("%s: Failed to allocate %lu bytes align=0x%lx\n", __func__, size, align);
[anders.roxell@linaro.org: use '%pa' with 'phys_addr_t' type]
Link: http://lkml.kernel.org/r/20190131161046.21886-1-anders.roxell@linaro.org
[rppt@linux.ibm.com: fix format strings for panics after memblock_alloc]
Link: http://lkml.kernel.org/r/1548950940-15145-1-git-send-email-rppt@linux.ibm.com
[rppt@linux.ibm.com: don't panic if the allocation in sparse_buffer_init fails]
Link: http://lkml.kernel.org/r/20190131074018.GD28876@rapoport-lnx
[akpm@linux-foundation.org: fix xtensa printk warning]
Link: http://lkml.kernel.org/r/1548057848-15136-20-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Guo Ren <ren_guo@c-sky.com> [c-sky]
Acked-by: Paul Burton <paul.burton@mips.com> [MIPS]
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [s390]
Reviewed-by: Juergen Gross <jgross@suse.com> [Xen]
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/*
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <linux/init.h>
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#include <linux/memblock.h>
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#include <linux/initrd.h>
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#include <asm/types.h>
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#include <init.h>
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#include <os.h>
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/* Changed by uml_initrd_setup, which is a setup */
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static char *initrd __initdata = NULL;
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static int load_initrd(char *filename, void *buf, int size);
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int __init read_initrd(void)
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{
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void *area;
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long long size;
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int err;
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if (initrd == NULL)
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return 0;
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err = os_file_size(initrd, &size);
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if (err)
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return 0;
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/*
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* This is necessary because alloc_bootmem craps out if you
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* ask for no memory.
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*/
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if (size == 0) {
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printk(KERN_ERR "\"%s\" is a zero-size initrd\n", initrd);
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return 0;
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}
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area = memblock_alloc(size, SMP_CACHE_BYTES);
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if (!area)
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panic("%s: Failed to allocate %llu bytes\n", __func__, size);
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if (load_initrd(initrd, area, size) == -1)
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return 0;
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initrd_start = (unsigned long) area;
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initrd_end = initrd_start + size;
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return 0;
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}
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static int __init uml_initrd_setup(char *line, int *add)
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{
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initrd = line;
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return 0;
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}
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__uml_setup("initrd=", uml_initrd_setup,
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"initrd=<initrd image>\n"
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" This is used to boot UML from an initrd image. The argument is the\n"
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" name of the file containing the image.\n\n"
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);
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static int load_initrd(char *filename, void *buf, int size)
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{
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int fd, n;
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fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
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if (fd < 0) {
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printk(KERN_ERR "Opening '%s' failed - err = %d\n", filename,
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-fd);
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return -1;
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}
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n = os_read_file(fd, buf, size);
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if (n != size) {
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printk(KERN_ERR "Read of %d bytes from '%s' failed, "
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"err = %d\n", size,
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filename, -n);
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return -1;
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}
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os_close_file(fd);
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return 0;
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}
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