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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2a5bda5a62
The alloc_bootmem(size) is a shortcut for allocation of SMP_CACHE_BYTES aligned memory. When the align parameter of memblock_alloc() is 0, the alignment is implicitly set to SMP_CACHE_BYTES and thus alloc_bootmem(size) and memblock_alloc(size, 0) are equivalent. The conversion is done using the following semantic patch: @@ expression size; @@ - alloc_bootmem(size) + memblock_alloc(size, 0) Link: http://lkml.kernel.org/r/1536927045-23536-22-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <lftan@altera.com> Cc: Mark Salter <msalter@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Serge Semin <fancer.lancer@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> 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>
82 lines
1.6 KiB
C
82 lines
1.6 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/bootmem.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, 0);
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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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