Revision 5e75d0b215b868337e7a193f28a543ec00e858b1 authored by Jianguo Wu on 31 December 2021, 02:01:08 UTC, committed by Jakub Kicinski on 01 January 2022, 02:36:41 UTC
As Paolo pointed out, the result of ping IPv6 address depends on the running distro. So explicitly checking the available ping feature, as e.g. do the bareudp.sh self-tests. Fixes: 8b3170e07539 ("selftests: net: using ping6 for IPv6 in udpgro_fwd.sh") Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn> Link: https://lore.kernel.org/r/825ee22b-4245-dbf7-d2f7-a230770d6e21@163.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
1 parent 0f1fe7b
io-mapping.c
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/mm.h>
#include <linux/io-mapping.h>
/**
* io_mapping_map_user - remap an I/O mapping to userspace
* @iomap: the source io_mapping
* @vma: user vma to map to
* @addr: target user address to start at
* @pfn: physical address of kernel memory
* @size: size of map area
*
* Note: this is only safe if the mm semaphore is held when called.
*/
int io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn, unsigned long size)
{
vm_flags_t expected_flags = VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
if (WARN_ON_ONCE((vma->vm_flags & expected_flags) != expected_flags))
return -EINVAL;
/* We rely on prevalidation of the io-mapping to skip track_pfn(). */
return remap_pfn_range_notrack(vma, addr, pfn, size,
__pgprot((pgprot_val(iomap->prot) & _PAGE_CACHE_MASK) |
(pgprot_val(vma->vm_page_prot) & ~_PAGE_CACHE_MASK)));
}
EXPORT_SYMBOL_GPL(io_mapping_map_user);
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