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c6f239796b
Before SLUB initialization, various subsystems used memblock_alloc to allocate memory. In most cases, when memory allocation fails, an immediate panic is required. To simplify this behavior and reduce repetitive checks, introduce `memblock_alloc_or_panic`. This function ensures that memory allocation failures result in a panic automatically, improving code readability and consistency across subsystems that require this behavior. [guoweikang.kernel@gmail.com: arch/s390: save_area_alloc default failure behavior changed to panic] Link: https://lkml.kernel.org/r/20250109033136.2845676-1-guoweikang.kernel@gmail.com Link: https://lore.kernel.org/lkml/Z2fknmnNtiZbCc7x@kernel.org/ Link: https://lkml.kernel.org/r/20250102072528.650926-1-guoweikang.kernel@gmail.com Signed-off-by: Guo Weikang <guoweikang.kernel@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> [s390] Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#include <linux/memblock.h>
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#include <os.h>
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#include "um_arch.h"
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static int __init __uml_load_file(const 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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void *uml_load_file(const char *filename, unsigned long long *size)
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{
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void *area;
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int err;
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*size = 0;
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if (!filename)
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return NULL;
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err = os_file_size(filename, size);
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if (err)
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return NULL;
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if (*size == 0) {
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printk(KERN_ERR "\"%s\" is empty\n", filename);
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return NULL;
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}
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area = memblock_alloc_or_panic(*size, SMP_CACHE_BYTES);
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if (__uml_load_file(filename, area, *size)) {
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memblock_free(area, *size);
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return NULL;
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}
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return area;
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}
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