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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/binfmts.h>
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#include <linux/elf.h>
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#include <linux/err.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <asm/page.h>
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extern char vdso_start[], vdso_end[];
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static unsigned int vdso_pages;
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static struct page **vdso_pagelist;
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static int __init vdso_init(void)
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{
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unsigned int i;
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vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
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vdso_pagelist =
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kzalloc_objs(struct page *, vdso_pages);
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if (unlikely(vdso_pagelist == NULL)) {
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pr_err("vdso: pagelist allocation failed\n");
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return -ENOMEM;
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}
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for (i = 0; i < vdso_pages; i++) {
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struct page *pg;
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pg = virt_to_page(vdso_start + (i << PAGE_SHIFT));
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vdso_pagelist[i] = pg;
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}
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return 0;
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}
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arch_initcall(vdso_init);
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int arch_setup_additional_pages(struct linux_binprm *bprm,
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int uses_interp)
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{
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struct vm_area_struct *vma;
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struct mm_struct *mm = current->mm;
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unsigned long vdso_base, vdso_len;
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int ret;
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static struct vm_special_mapping vdso_mapping = {
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.name = "[vdso]",
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};
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vdso_len = vdso_pages << PAGE_SHIFT;
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mmap_write_lock(mm);
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vdso_base = get_unmapped_area(NULL, 0, vdso_len, 0, 0);
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if (IS_ERR_VALUE(vdso_base)) {
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ret = vdso_base;
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goto end;
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}
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/*
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* Put vDSO base into mm struct. We need to do this before calling
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* install_special_mapping or the perf counter mmap tracking code
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* will fail to recognise it as a vDSO (since arch_vma_name fails).
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*/
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mm->context.vdso = (void *)vdso_base;
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vdso_mapping.pages = vdso_pagelist;
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vma =
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_install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT,
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(VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC),
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&vdso_mapping);
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if (IS_ERR(vma)) {
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ret = PTR_ERR(vma);
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mm->context.vdso = NULL;
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goto end;
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}
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vdso_base += (vdso_pages << PAGE_SHIFT);
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ret = 0;
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end:
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mmap_write_unlock(mm);
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return ret;
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}
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