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| author |   David S. Miller <davem@davemloft.net> | 2018-05-07 23:35:08 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-07 23:35:08 -0400 |
| commit | 01adc4851a8090b46c7a5ed9cfc4b97e65abfbf4 (patch) | |
| tree | 2ae02593d7139962648dff203f3f9701e34ccbc3 /kernel/bpf/tnum.c | |
| parent | liquidio: support use of ethtool to set link speed of CN23XX-225 cards (diff) | |
| parent | bpf, xskmap: fix crash in xsk_map_alloc error path handling (diff) | |
| download | linux-dev-01adc4851a8090b46c7a5ed9cfc4b97e65abfbf4.tar.xz linux-dev-01adc4851a8090b46c7a5ed9cfc4b97e65abfbf4.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Minor conflict, a CHECK was placed into an if() statement
in net-next, whilst a newline was added to that CHECK
call in 'net'. Thanks to Daniel for the merge resolution.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/tnum.c')
| -rw-r--r-- | kernel/bpf/tnum.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/bpf/tnum.c b/kernel/bpf/tnum.c index 1f4bf68c12db..938d41211be7 100644 --- a/kernel/bpf/tnum.c +++ b/kernel/bpf/tnum.c @@ -43,6 +43,16 @@ struct tnum tnum_rshift(struct tnum a, u8 shift) return TNUM(a.value >> shift, a.mask >> shift); } +struct tnum tnum_arshift(struct tnum a, u8 min_shift) +{ + /* if a.value is negative, arithmetic shifting by minimum shift + * will have larger negative offset compared to more shifting. + * If a.value is nonnegative, arithmetic shifting by minimum shift + * will have larger positive offset compare to more shifting. + */ + return TNUM((s64)a.value >> min_shift, (s64)a.mask >> min_shift); +} + struct tnum tnum_add(struct tnum a, struct tnum b) { u64 sm, sv, sigma, chi, mu; |