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be99f610 AP |
1 | # |
2 | # Small script that refreshes the kernel feature support status in place. | |
3 | # | |
4 | ||
5 | for F_FILE in Documentation/features/*/*/arch-support.txt; do | |
6 | F=$(grep "^# Kconfig:" "$F_FILE" | cut -c26-) | |
7 | ||
8 | # | |
9 | # Each feature F is identified by a pair (O, K), where 'O' can | |
10 | # be either the empty string (for 'nop') or "not" (the logical | |
11 | # negation operator '!'); other operators are not supported. | |
12 | # | |
13 | O="" | |
14 | K=$F | |
15 | if [[ "$F" == !* ]]; then | |
16 | O="not" | |
17 | K=$(echo $F | sed -e 's/^!//g') | |
18 | fi | |
19 | ||
20 | # | |
21 | # F := (O, K) is 'valid' iff there is a Kconfig file (for some | |
22 | # arch) which contains K. | |
23 | # | |
24 | # Notice that this definition entails an 'asymmetry' between | |
25 | # the case 'O = ""' and the case 'O = "not"'. E.g., F may be | |
26 | # _invalid_ if: | |
27 | # | |
28 | # [case 'O = ""'] | |
29 | # 1) no arch provides support for F, | |
30 | # 2) K does not exist (e.g., it was renamed/mis-typed); | |
31 | # | |
32 | # [case 'O = "not"'] | |
33 | # 3) all archs provide support for F, | |
34 | # 4) as in (2). | |
35 | # | |
36 | # The rationale for adopting this definition (and, thus, for | |
37 | # keeping the asymmetry) is: | |
38 | # | |
39 | # We want to be able to 'detect' (2) (or (4)). | |
40 | # | |
41 | # (1) and (3) may further warn the developers about the fact | |
42 | # that K can be removed. | |
43 | # | |
44 | F_VALID="false" | |
45 | for ARCH_DIR in arch/*/; do | |
46 | K_FILES=$(find $ARCH_DIR -name "Kconfig*") | |
47 | K_GREP=$(grep "$K" $K_FILES) | |
48 | if [ ! -z "$K_GREP" ]; then | |
49 | F_VALID="true" | |
50 | break | |
51 | fi | |
52 | done | |
53 | if [ "$F_VALID" = "false" ]; then | |
54 | printf "WARNING: '%s' is not a valid Kconfig\n" "$F" | |
55 | fi | |
56 | ||
57 | T_FILE="$F_FILE.tmp" | |
58 | grep "^#" $F_FILE > $T_FILE | |
59 | echo " -----------------------" >> $T_FILE | |
60 | echo " | arch |status|" >> $T_FILE | |
61 | echo " -----------------------" >> $T_FILE | |
62 | for ARCH_DIR in arch/*/; do | |
7b5a5242 | 63 | ARCH=$(echo $ARCH_DIR | sed -e 's/^arch//g' | sed -e 's/\///g') |
be99f610 AP |
64 | K_FILES=$(find $ARCH_DIR -name "Kconfig*") |
65 | K_GREP=$(grep "$K" $K_FILES) | |
66 | # | |
67 | # Arch support status values for (O, K) are updated according | |
68 | # to the following rules. | |
69 | # | |
70 | # - ("", K) is 'supported by a given arch', if there is a | |
71 | # Kconfig file for that arch which contains K; | |
72 | # | |
73 | # - ("not", K) is 'supported by a given arch', if there is | |
74 | # no Kconfig file for that arch which contains K; | |
75 | # | |
76 | # - otherwise: preserve the previous status value (if any), | |
77 | # default to 'not yet supported'. | |
78 | # | |
79 | # Notice that, according these rules, invalid features may be | |
80 | # updated/modified. | |
81 | # | |
82 | if [ "$O" = "" ] && [ ! -z "$K_GREP" ]; then | |
83 | printf " |%12s: | ok |\n" "$ARCH" >> $T_FILE | |
84 | elif [ "$O" = "not" ] && [ -z "$K_GREP" ]; then | |
85 | printf " |%12s: | ok |\n" "$ARCH" >> $T_FILE | |
86 | else | |
87 | S=$(grep -v "^#" "$F_FILE" | grep " $ARCH:") | |
88 | if [ ! -z "$S" ]; then | |
89 | echo "$S" >> $T_FILE | |
90 | else | |
91 | printf " |%12s: | TODO |\n" "$ARCH" \ | |
92 | >> $T_FILE | |
93 | fi | |
94 | fi | |
95 | done | |
96 | echo " -----------------------" >> $T_FILE | |
97 | mv $T_FILE $F_FILE | |
98 | done |