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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ALPHA_CHECKSUM_H
#define _ALPHA_CHECKSUM_H

#include <linux/in6.h>

/*
 *	This is a version of ip_compute_csum() optimized for IP headers,
 *	which always checksum on 4 octet boundaries.
 */
extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);

/*
 * computes the checksum of the TCP/UDP pseudo-header
 * returns a 16-bit checksum, already complemented
 */
__sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
			  __u32 len, __u8 proto, __wsum sum);

__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
			  __u32 len, __u8 proto, __wsum sum);

/*
 * computes the checksum of a memory block at buff, length len,
 * and adds in "sum" (32-bit)
 *
 * returns a 32-bit number suitable for feeding into itself
 * or csum_tcpudp_magic
 *
 * this function must be called with even lengths, except
 * for the last fragment, which may be odd
 *
 * it's best to have buff aligned on a 32-bit boundary
 */
extern __wsum csum_partial(const void *buff, int len, __wsum sum);

/*
 * the same as csum_partial, but copies from src while it
 * checksums
 *
 * here even more important to align src and dst on a 32-bit (or even
 * better 64-bit) boundary
 */
__wsum csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *errp);

__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum);


/*
 * this routine is used for miscellaneous IP-like checksums, mainly
 * in icmp.c
 */

extern __sum16 ip_compute_csum(const void *buff, int len);

/*
 *	Fold a partial checksum without adding pseudo headers
 */

static inline __sum16 csum_fold(__wsum csum)
{
	u32 sum = (__force u32)csum;
	sum = (sum & 0xffff) + (sum >> 16);
	sum = (sum & 0xffff) + (sum >> 16);
	return (__force __sum16)~sum;
}

#define _HAVE_ARCH_IPV6_CSUM
extern __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
			       const struct in6_addr *daddr,
			       __u32 len, __u8 proto, __wsum sum);
#endif

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Name Type Size Permission Actions
Kbuild File 320 B 0644
a.out-core.h File 2.41 KB 0644
a.out.h File 574 B 0644
agp.h File 457 B 0644
agp_backend.h File 948 B 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 405 B 0644
atomic.h File 9.15 KB 0644
barrier.h File 2.17 KB 0644
bitops.h File 8.83 KB 0644
bug.h File 571 B 0644
bugs.h File 294 B 0644
cache.h File 507 B 0644
cacheflush.h File 2.68 KB 0644
checksum.h File 1.93 KB 0644
cmpxchg.h File 1.67 KB 0644
compiler.h File 498 B 0644
console.h File 1.06 KB 0644
core_apecs.h File 16.91 KB 0644
core_cia.h File 15.43 KB 0644
core_irongate.h File 6.63 KB 0644
core_lca.h File 11.36 KB 0644
core_marvel.h File 9.15 KB 0644
core_mcpcia.h File 11.45 KB 0644
core_polaris.h File 2.92 KB 0644
core_t2.h File 19.13 KB 0644
core_titan.h File 11.2 KB 0644
core_tsunami.h File 8.29 KB 0644
core_wildfire.h File 8.45 KB 0644
delay.h File 264 B 0644
device.h File 129 B 0644
div64.h File 31 B 0644
dma-mapping.h File 276 B 0644
dma.h File 12.37 KB 0644
elf.h File 5.71 KB 0644
emergency-restart.h File 149 B 0644
err_common.h File 3.24 KB 0644
err_ev6.h File 116 B 0644
err_ev7.h File 4.37 KB 0644
extable.h File 1.42 KB 0644
floppy.h File 3.07 KB 0644
fpu.h File 1.78 KB 0644
ftrace.h File 12 B 0644
futex.h File 1.97 KB 0644
gct.h File 1.02 KB 0644
hardirq.h File 223 B 0644
hw_irq.h File 302 B 0644
hwrpb.h File 6.9 KB 0644
io.h File 15.03 KB 0644
io_trivial.h File 3.07 KB 0644
irq.h File 2.31 KB 0644
irq_regs.h File 34 B 0644
irqflags.h File 1.17 KB 0644
jensen.h File 8.39 KB 0644
kdebug.h File 32 B 0644
kmap_types.h File 265 B 0644
linkage.h File 256 B 0644
local.h File 2.59 KB 0644
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mc146818rtc.h File 680 B 0644
mce.h File 4.04 KB 0644
mmu.h File 203 B 0644
mmu_context.h File 7.09 KB 0644
mmzone.h File 2.98 KB 0644
module.h File 329 B 0644
page.h File 2.46 KB 0644
pal.h File 5.01 KB 0644
param.h File 284 B 0644
parport.h File 536 B 0644
pci.h File 2.87 KB 0644
percpu.h File 527 B 0644
perf_event.h File 105 B 0644
pgalloc.h File 1.82 KB 0644
pgtable.h File 13.17 KB 0644
processor.h File 2.07 KB 0644
ptrace.h File 754 B 0644
rwsem.h File 4.62 KB 0644
segment.h File 132 B 0644
serial.h File 1.01 KB 0644
sfp-machine.h File 2.86 KB 0644
shmparam.h File 191 B 0644
signal.h File 627 B 0644
smp.h File 1.34 KB 0644
socket.h File 310 B 0644
special_insns.h File 925 B 0644
spinlock.h File 2.85 KB 0644
spinlock_types.h File 413 B 0644
string.h File 2.42 KB 0644
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syscall.h File 235 B 0644
termios.h File 2.98 KB 0644
thread_info.h File 3.63 KB 0644
timex.h File 827 B 0644
tlb.h File 473 B 0644
tlbflush.h File 3.37 KB 0644
topology.h File 957 B 0644
types.h File 143 B 0644
uaccess.h File 9.56 KB 0644
ucontext.h File 348 B 0644
unaligned.h File 340 B 0644
unistd.h File 494 B 0644
user.h File 2.14 KB 0644
vga.h File 2 KB 0644
word-at-a-time.h File 1.34 KB 0644
wrperfmon.h File 2.56 KB 0644
xchg.h File 5.74 KB 0644
xor.h File 21.71 KB 0644