doc: bpf doc minor adjustments

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
netoptimizer · Feb 7, 2017 · ee7344c · ee7344c
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diff --git a/kernel/Documentation/bpf/ebpf_maps.rst b/kernel/Documentation/bpf/ebpf_maps.rst
@@ -123,6 +123,9 @@ files for defining the maps, but it uses another layout.  See man-page
 .. _tc bpf examples:
    https://git.kernel.org/cgit/linux/kernel/git/shemminger/iproute2.git/tree/examples/bpf
 
+.. _tc-bpf(8): http://man7.org/linux/man-pages/man8/tc-bpf.8.html
+
+
 Interacting with maps
 =====================
 
@@ -255,6 +258,3 @@ is understood by LLVM when generating eBPF instructions.
 .. _bpf(2): http://man7.org/linux/man-pages/man2/bpf.2.html
 
 .. _bpf: http://man7.org/linux/man-pages/man2/bpf.2.html
-
-.. _tc-bpf(8): http://man7.org/linux/man-pages/man8/tc-bpf.8.html
-
diff --git a/kernel/Documentation/bpf/ebpf_maps_types.rst b/kernel/Documentation/bpf/ebpf_maps_types.rst
@@ -65,7 +65,6 @@ BPF_MAP_TYPE_ARRAY
 Implementation defined in `kernel/bpf/arraymap.c`_ via struct
 bpf_map_ops `array_ops`_.
 
-
 As the name ``BPF_MAP_TYPE_ARRAY`` indicates, this can be seen as an
 array.  All array elements are pre-allocated and zero initialized at
 init time.  Key is an index in array and can only be 4 bytes (32-bit).
@@ -78,7 +77,6 @@ life of the eBPF program, which allows verifier+JIT to perform a wider
 range of optimizations.  E.g. `array_map_lookup_elem()`_ may be
 'inlined' by JIT.
 
-
 Small size gotcha, the ``value_size`` is rounded up to 8 bytes.
 
 Example usage BPF_MAP_TYPE_ARRAY, based on `samples/bpf/sockex1_kern.c`_:
@@ -119,9 +117,3 @@ when updating the value in-place.
 
 .. _samples/bpf/sockex1_kern.c:
    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/samples/bpf/sockex1_kern.c
-
-
-.. Notes
-   git log kernel/bpf/arraymap.c|tail -33
-   git log kernel/bpf/hashtab.c|tail -33
-   will give an overview of key hash and array map principles.
diff --git a/kernel/Documentation/bpf/index.rst b/kernel/Documentation/bpf/index.rst
@@ -7,7 +7,7 @@ Introduction
 
 The Berkeley Packet Filter (BPF) started (`article 1992`_) as a
 special-purpose virtual machine (register based filter evaluator) for
-filtering network packets, best known for the its in tcpdump. It is
+filtering network packets, best known for its use in tcpdump. It is
 documented in the kernel tree, in the first part of:
 `Documentation/networking/filter.txt`_