The 'imply' keyword restricts a symbol to y or n, excluding m when it is implied by y. This is the original behavior since commit 237e3ad0f195 ("Kconfig: Introduce the "imply" keyword"). However, the author of this feature, Nicolas Pitre, stated that the 'imply' keyword should not impose any restrictions. (https://lkml.org/lkml/2020/2/19/714) I agree, and want to get rid of this tricky behavior.
Unified · Split
| @@ -173,7 +173,7 @@ applicable everywhere (see syntax). · 172 unmodified lines | ||
| 173 | 173 | === === ============= ============== |
| 174 | 174 | n y n N/m/y |
| 175 | 175 | m y m M/y/n |
| 176 | − y y y Y/n | |
| 176 | + y y y Y/m/n | |
| 177 | 177 | y n * N |
| 178 | 178 | === === ============= ============== |
| 179 | 179 | |
| @@ -181,6 +181,16 @@ applicable everywhere (see syntax). · 1 unmodified line | ||
| 181 | 181 | ability to hook into a secondary subsystem while allowing the user to |
| 182 | 182 | configure that subsystem out without also having to unset these drivers. |
| 183 | 183 | |
| 184 | + Note: If the combination of FOO=y and BAR=m causes a link error, | |
| 185 | + you can guard the function call with IS_REACHABLE():: | |
| 186 | + | |
| 187 | + foo_init() | |
| 188 | + { | |
| 189 | + if (IS_REACHABLE(CONFIG_BAZ)) | |
| 190 | + baz_register(&foo); | |
| 191 | + ... | |
| 192 | + } | |
| 193 | + | |
| 184 | 194 | - limiting menu display: "visible if" <expr> |
| 185 | 195 | |
| 186 | 196 | This attribute is only applicable to menu blocks, if the condition is |
| @@ -401,8 +401,7 @@ void sym_calc_value(struct symbol *sym) · 400 unmodified lines | ||
| 401 | 401 | sym_warn_unmet_dep(sym); |
| 402 | 402 | newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri); |
| 403 | 403 | } |
| 404 | − if (newval.tri == mod && | |
| 405 | − (sym_get_type(sym) == S_BOOLEAN || sym->implied.tri == yes)) | |
| 404 | + if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN) | |
| 406 | 405 | newval.tri = yes; |
| 407 | 406 | break; |
| 408 | 407 | case S_STRING: |
| @@ -484,8 +483,6 @@ bool sym_tristate_within_range(struct symbol *sym, tristate val) · 75 unmodified lines | ||
| 484 | 483 | return false; |
| 485 | 484 | if (sym->visible <= sym->rev_dep.tri) |
| 486 | 485 | return false; |
| 487 | − if (sym->implied.tri == yes && val == mod) | |
| 488 | − return false; | |
| 489 | 486 | if (sym_is_choice_value(sym) && sym->visible == yes) |
| 490 | 487 | return val == yes; |
| 491 | 488 | return val >= sym->rev_dep.tri && val <= sym->visible; |