mm/migrate: correct failure handling if !hugepage_migration_support()

[firefly-linux-kernel-4.4.55.git] / net / core / filter.c

diff --git a/net/core/filter.c b/net/core/filter.c
index 01b780856db29e5a2a7ebbc36aa7062340b28bb8..ad30d626a5bd3f5cbd585d0641ab79aa29c3c446 100644 (file)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -36,7 +36,6 @@
 #include <asm/uaccess.h>
 #include <asm/unaligned.h>
 #include <linux/filter.h>
-#include <linux/reciprocal_div.h>
 #include <linux/ratelimit.h>
 #include <linux/seccomp.h>
 #include <linux/if_vlan.h>
@@ -166,7 +165,7 @@ unsigned int sk_run_filter(const struct sk_buff *skb,
                        A /= X;
                        continue;
                case BPF_S_ALU_DIV_K:
-                       A = reciprocal_divide(A, K);
+                       A /= K;
                        continue;
                case BPF_S_ALU_MOD_X:
                        if (X == 0)
@@ -553,11 +552,6 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
                /* Some instructions need special checks */
                switch (code) {
                case BPF_S_ALU_DIV_K:
-                       /* check for division by zero */
-                       if (ftest->k == 0)
-                               return -EINVAL;
-                       ftest->k = reciprocal_value(ftest->k);
-                       break;
                case BPF_S_ALU_MOD_K:
                        /* check for division by zero */
                        if (ftest->k == 0)
@@ -853,27 +847,7 @@ void sk_decode_filter(struct sock_filter *filt, struct sock_filter *to)
        to->code = decodes[code];
        to->jt = filt->jt;
        to->jf = filt->jf;
-
-       if (code == BPF_S_ALU_DIV_K) {
-               /*
-                * When loaded this rule user gave us X, which was
-                * translated into R = r(X). Now we calculate the
-                * RR = r(R) and report it back. If next time this
-                * value is loaded and RRR = r(RR) is calculated
-                * then the R == RRR will be true.
-                *
-                * One exception. X == 1 translates into R == 0 and
-                * we can't calculate RR out of it with r().
-                */
-
-               if (filt->k == 0)
-                       to->k = 1;
-               else
-                       to->k = reciprocal_value(filt->k);
-
-               BUG_ON(reciprocal_value(to->k) != filt->k);
-       } else
-               to->k = filt->k;
+       to->k = filt->k;
 }
 
 int sk_get_filter(struct sock *sk, struct sock_filter __user *ubuf, unsigned int len)