diff options
| author |   Jan Beulich <JBeulich@suse.com> | 2015-06-15 13:00:21 +0100 |
|---|---|---|
| committer |   Michal Marek <mmarek@suse.cz> | 2015-06-15 14:05:58 +0200 |
| commit | 31847b67bec0e989961118520406a63fdeac7246 (patch) | |
| tree | 1c38fb180047884dd1428b1d84beccf78c37ccc7 /scripts/kconfig/zconf.y | |
| parent | kconfig: don't silently ignore unhandled characters (diff) | |
| download | linux-dev-31847b67bec0e989961118520406a63fdeac7246.tar.xz linux-dev-31847b67bec0e989961118520406a63fdeac7246.zip | |
kconfig: allow use of relations other than (in)equality
Over the years I found it desirable to be able to use all sorts of
relations, not just (in)equality. And apparently I'm not the only one,
as there's at least one example in the tree where the programmer
assumed this would work (see DEBUG_UART_8250_WORD in
arch/arm/Kconfig.debug). Another possible use would e.g. be to fold the
two SMP/NR_CPUS prompts into one: SMP could be promptless, simply
depending on NR_CPUS > 1.
A (desirable) side effect of this change - resulting from numeric
values now necessarily being compared as numbers rather than as
strings - is that comparing hex values now works as expected: Other
than int ones (which aren't allowed to have leading zeroes), zeroes
following the 0x prefix made them compare unequal even if their values
were equal.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to '')
| -rw-r--r-- | scripts/kconfig/zconf.y | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y index 0f683cfa53e9..71bf8bff696a 100644 --- a/scripts/kconfig/zconf.y +++ b/scripts/kconfig/zconf.y @@ -69,6 +69,10 @@ static struct menu *current_menu, *current_entry; %token <string> T_WORD %token <string> T_WORD_QUOTE %token T_UNEQUAL +%token T_LESS +%token T_LESS_EQUAL +%token T_GREATER +%token T_GREATER_EQUAL %token T_CLOSE_PAREN %token T_OPEN_PAREN %token T_EOL @@ -76,6 +80,7 @@ static struct menu *current_menu, *current_entry; %left T_OR %left T_AND %left T_EQUAL T_UNEQUAL +%left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL %nonassoc T_NOT %type <string> prompt @@ -467,6 +472,10 @@ if_expr: /* empty */ { $$ = NULL; } ; expr: symbol { $$ = expr_alloc_symbol($1); } + | symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); } + | symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); } + | symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); } + | symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); } | symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); } | symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); } | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; } |