[NET]: Clean up comments for sk_chk_filter()
This removes redundant comments, and moves one comment to a better location. Signed-off-by: Kris Katterjohn <kjak@users.sourceforge.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -287,7 +287,9 @@ load_b:
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* no references or jumps that are out of range, no illegal
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* instructions, and must end with a RET instruction.
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*
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* Returns 0 if the rule set is legal or a negative errno code if not.
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* All jumps are forward as they are not signed.
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*
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* Returns 0 if the rule set is legal or -EINVAL if not.
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*/
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int sk_chk_filter(struct sock_filter *filter, int flen)
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{
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@ -299,7 +301,6 @@ int sk_chk_filter(struct sock_filter *filter, int flen)
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/* check the filter code now */
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for (pc = 0; pc < flen; pc++) {
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/* all jumps are forward as they are not signed */
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ftest = &filter[pc];
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/* Only allow valid instructions */
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@ -383,11 +384,6 @@ int sk_chk_filter(struct sock_filter *filter, int flen)
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}
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}
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/*
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* The program must end with a return. We don't care where they
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* jumped within the script (its always forwards) but in the end
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* they _will_ hit this.
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*/
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return (BPF_CLASS(filter[flen - 1].code) == BPF_RET) ? 0 : -EINVAL;
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}
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