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author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2022-06-07 20:50:25 +0800 |
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committer | Will Deacon <will@kernel.org> | 2022-06-27 12:22:31 +0100 |
commit | 18e780b4e6ab89a3a10f46d151971863562c1c91 (patch) | |
tree | af78abe8a479005ef769c60ac3d772d4a6afc014 /mm/shuffle.c | |
parent | a14fff1c0379d0422c5ca0084b0ab86ed7bedf3e (diff) | |
download | linux-18e780b4e6ab89a3a10f46d151971863562c1c91.tar.bz2 |
mm: ioremap: Add ioremap/iounmap_allowed()
Add special hook for architecture to verify addr, size or prot
when ioremap() or iounmap(), which will make the generic ioremap
more useful.
ioremap_allowed() return a bool,
- true means continue to remap
- false means skip remap and return directly
iounmap_allowed() return a bool,
- true means continue to vunmap
- false code means skip vunmap and return directly
Meanwhile, only vunmap the address when it is in vmalloc area
as the generic ioremap only returns vmalloc addresses.
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Baoquan He <bhe@redhat.com>
Link: https://lore.kernel.org/r/20220607125027.44946-5-wangkefeng.wang@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'mm/shuffle.c')
0 files changed, 0 insertions, 0 deletions