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kmap_atomic() is deprecated and should be replaced with kmap_local_page() [1][2]. kmap_local_page() is faster in kernels with HIGHMEM enabled, can take page faults, and allows preemption. According to [2], this replacement is safe as long as the code between kmap_atomic() and kunmap_atomic() does not implicitly depend on disabling page faults or preemption. In this patch, the only thing happening between mapping and unmapping the page is a memcpy, and I don't suspect it depends on disabling page faults or preemption. [1] https://lwn.net/Articles/836144/ [2] https://docs.kernel.org/mm/highmem.html#temporary-virtual-mappings Signed-off-by: David Reaver <me@davidreaver.com> Reviewed-by: Amit Shah <amit@kernel.org> Link: https://lore.kernel.org/r/20250109035904.168345-1-me@davidreaver.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2233 lines
53 KiB
2233 lines
53 KiB