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| author | Arnd Bergmann <arnd@arndb.de> | 2009-06-23 21:37:26 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2009-11-03 16:06:52 +0100 |
| commit | 20c1f641bb80fb272dec959a5caabed92e5a422e (patch) | |
| tree | f86824522190b527c211ae43054e1e0a1f25568d /lib/checksum.c | |
| parent | c44ba9f6684946b156335da6a6d55f0b8cf7cb72 (diff) | |
| download | lwn-20c1f641bb80fb272dec959a5caabed92e5a422e.tar.gz lwn-20c1f641bb80fb272dec959a5caabed92e5a422e.zip | |
lib/checksum.c: make do_csum optional
Mike Frysinger suggested that do_csum should be optional
so that an architecture can use the generic checksum code
but still provide an optimized fast-path for the most
critical function.
This can mean an implementation using inline assembly,
or in case of Alpha one using 64-bit arithmetic in C.
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'lib/checksum.c')
| -rw-r--r-- | lib/checksum.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/checksum.c b/lib/checksum.c index 886b48db4f28..b08c2d059024 100644 --- a/lib/checksum.c +++ b/lib/checksum.c @@ -37,6 +37,7 @@ #include <asm/byteorder.h> +#ifndef do_csum static inline unsigned short from32to16(unsigned int x) { /* add up 16-bit and 16-bit for 16+c bit */ @@ -102,6 +103,7 @@ static unsigned int do_csum(const unsigned char *buff, int len) out: return result; } +#endif /* * This is a version of ip_compute_csum() optimized for IP headers, |