lib/compute_ip_checksum: mark data buffer as const
compute_ip_checksum() doesn't manipulate the data it is passed. Therefore, mark it as const. BUG=chrome-os-partner:56151 Change-Id: I54cff9695a886bacd6314aa441d96aaa7a991101 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/17714 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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#ifndef IP_CHECKSUM_H
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#define IP_CHECKSUM_H
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unsigned long compute_ip_checksum(void *addr, unsigned long length);
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unsigned long compute_ip_checksum(const void *addr, unsigned long length);
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unsigned long add_ip_checksums(unsigned long offset, unsigned long sum, unsigned long new);
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#endif /* IP_CHECKSUM_H */
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#include <stdint.h>
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#include <ip_checksum.h>
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unsigned long compute_ip_checksum(void *addr, unsigned long length)
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unsigned long compute_ip_checksum(const void *addr, unsigned long length)
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{
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uint8_t *ptr;
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const uint8_t *ptr;
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volatile union {
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uint8_t byte[2];
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uint16_t word;
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