Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
io_uring: add helper calculating region byte size
There has been type related issues with region size calculation, add an
utility helper function that returns the size and handles type
conversions right.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
authored by
Pavel Begunkov
and committed by
Jens Axboe
4aed5b4e
21bd7b14
+7
-2
+2
-2
io_uring/memmap.c
+2
-2
io_uring/memmap.c
···
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static int io_region_pin_pages(struct io_mapped_region *mr,
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struct io_uring_region_desc *reg)
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{
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-
unsigned long size = mr->nr_pages << PAGE_SHIFT;
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+
size_t size = io_region_size(mr);
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struct page **pages;
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int nr_pages;
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···
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unsigned long mmap_offset)
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{
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gfp_t gfp = GFP_KERNEL_ACCOUNT | __GFP_ZERO | __GFP_NOWARN;
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-
size_t size = (size_t) mr->nr_pages << PAGE_SHIFT;
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+
size_t size = io_region_size(mr);
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unsigned long nr_allocated;
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struct page **pages;
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