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| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-20 09:43:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-20 09:43:40 +0200 |
| commit | c4d41d00552754cc8cdd66a52da9b7c203884d49 (patch) | |
| tree | 60be0f3d543ad6d300a033d91dc313bc595cd737 /tools/lib/bpf/hashmap.h | |
| parent | hpilo: Replace one-element array with flexible-array member (diff) | |
| parent | Linux 5.8-rc6 (diff) | |
| download | wireguard-linux-c4d41d00552754cc8cdd66a52da9b7c203884d49.tar.xz wireguard-linux-c4d41d00552754cc8cdd66a52da9b7c203884d49.zip | |
Merge v5.8-rc6 into char-misc-next
We need the char/misc fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/lib/bpf/hashmap.h')
| -rw-r--r-- | tools/lib/bpf/hashmap.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/tools/lib/bpf/hashmap.h b/tools/lib/bpf/hashmap.h index df59fd4fc95b..e0af36b0e5d8 100644 --- a/tools/lib/bpf/hashmap.h +++ b/tools/lib/bpf/hashmap.h @@ -11,14 +11,18 @@ #include <stdbool.h> #include <stddef.h> #include <limits.h> -#ifndef __WORDSIZE -#define __WORDSIZE (__SIZEOF_LONG__ * 8) -#endif static inline size_t hash_bits(size_t h, int bits) { /* shuffle bits and return requested number of upper bits */ - return (h * 11400714819323198485llu) >> (__WORDSIZE - bits); +#if (__SIZEOF_SIZE_T__ == __SIZEOF_LONG_LONG__) + /* LP64 case */ + return (h * 11400714819323198485llu) >> (__SIZEOF_LONG_LONG__ * 8 - bits); +#elif (__SIZEOF_SIZE_T__ <= __SIZEOF_LONG__) + return (h * 2654435769lu) >> (__SIZEOF_LONG__ * 8 - bits); +#else +# error "Unsupported size_t size" +#endif } typedef size_t (*hashmap_hash_fn)(const void *key, void *ctx); |