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Kbuild updates for v4.16 (2nd)

Browse source 
Makefile changes:
 - enable unused-variable warning that was wrongly disabled for clang
 
 Kconfig changes:
 - warn blank 'help' and fix existing instances
 - fix 'choice' behavior to not write out invisible symbols
 - fix misc weirdness
 
 Coccinell changes:
 - fix false positive of free after managed memory alloc detection
 - improve performance of NULL dereference detection
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Merge tag 'kbuild-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:
 "Makefile changes:
   - enable unused-variable warning that was wrongly disabled for clang

  Kconfig changes:
   - warn about blank 'help' and fix existing instances
   - fix 'choice' behavior to not write out invisible symbols
   - fix misc weirdness

  Coccinell changes:
   - fix false positive of free after managed memory alloc detection
   - improve performance of NULL dereference detection"

* tag 'kbuild-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (21 commits)
  kconfig: remove const qualifier from sym_expand_string_value()
  kconfig: add xrealloc() helper
  kconfig: send error messages to stderr
  kconfig: echo stdin to stdout if either is redirected
  kconfig: remove check_stdin()
  kconfig: remove 'config*' pattern from .gitignnore
  kconfig: show '?' prompt even if no help text is available
  kconfig: do not write choice values when their dependency becomes n
  coccinelle: deref_null: avoid useless computation
  coccinelle: devm_free: reduce false positives
  kbuild: clang: disable unused variable warnings only when constant
  kconfig: Warn if help text is blank
  nios2: kconfig: Remove blank help text
  arm: vt8500: kconfig: Remove blank help text
  MIPS: kconfig: Remove blank help text
  MIPS: BCM63XX: kconfig: Remove blank help text
  lib/Kconfig.debug: Remove blank help text
  Staging: rtl8192e: kconfig: Remove blank help text
  Staging: rtl8192u: kconfig: Remove blank help text
  mmc: kconfig: Remove blank help text
  ...
This commit is contained in:
Linus Torvalds 2018-02-09 19:32:41 -08:00
commit 9a61df9e5f
23 changed files with 121 additions and 77 deletions
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3
Makefile
View file

@ -729,7 +729,6 @@ endif
ifeq ($(cc-name),clang)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
@ -747,9 +746,9 @@ else
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
endif
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else

1
arch/arm/mach-vt8500/Kconfig
View file

@ -13,7 +13,6 @@ config ARCH_WM8505
depends on ARCH_MULTI_V5
select ARCH_VT8500
select CPU_ARM926T
help
config ARCH_WM8750
bool "WonderMedia WM8750"

1
arch/mips/Kconfig
View file

@ -2333,7 +2333,6 @@ config MIPS_VPE_LOADER_TOM
config MIPS_VPE_APSP_API
bool "Enable support for AP/SP API (RTLX)"
depends on MIPS_VPE_LOADER
help
config MIPS_VPE_APSP_API_CMP
bool

1
arch/mips/bcm63xx/boards/Kconfig
View file

@ -7,6 +7,5 @@ choice
config BOARD_BCM963XX
bool "Generic Broadcom 963xx boards"
select SSB
help
endchoice

1
arch/nios2/Kconfig
View file

@ -152,7 +152,6 @@ menu "Advanced setup"
config ADVANCED_OPTIONS
bool "Prompt for advanced kernel configuration options"
help
comment "Default settings for advanced configuration options are used"
depends on !ADVANCED_OPTIONS

1
drivers/mmc/host/Kconfig
View file

@ -874,7 +874,6 @@ config MMC_CQHCI
config MMC_TOSHIBA_PCI
tristate "Toshiba Type A SD/MMC Card Interface Driver"
depends on PCI
help
config MMC_BCM2835
tristate "Broadcom BCM2835 SDHOST MMC Controller support"

1
drivers/staging/rtl8192e/rtl8192e/Kconfig
View file

@ -6,4 +6,3 @@ config RTL8192E
select WEXT_PRIV
select CRYPTO
select FW_LOADER
---help---

1
drivers/staging/rtl8192u/Kconfig
View file

@ -5,4 +5,3 @@ config RTL8192U
select WIRELESS_EXT
select WEXT_PRIV
select CRYPTO
---help---

1
drivers/video/fbdev/Kconfig
View file

@ -1156,7 +1156,6 @@ config FB_I810_I2C
bool "Enable DDC Support"
depends on FB_I810 && FB_I810_GTF
select FB_DDC
help
config FB_LE80578
tristate "Intel LE80578 (Vermilion) support"

1
lib/Kconfig.debug
View file

@ -351,7 +351,6 @@ config SECTION_MISMATCH_WARN_ONLY
#
config ARCH_WANT_FRAME_POINTERS
bool
help
config FRAME_POINTER
bool "Compile the kernel with frame pointers"

55
scripts/coccinelle/free/devm_free.cocci
View file

@ -56,9 +56,62 @@ expression x;
x = devm_ioport_map(...)
)
@safe depends on context || org || report exists@
expression x;
position p;
@@
(
x = kmalloc(...)
|
x = kvasprintf(...)
|
x = kasprintf(...)
|
x = kzalloc(...)
|
x = kmalloc_array(...)
|
x = kcalloc(...)
|
x = kstrdup(...)
|
x = kmemdup(...)
|
x = get_free_pages(...)
|
x = request_irq(...)
|
x = ioremap(...)
|
x = ioremap_nocache(...)
|
x = ioport_map(...)
)
...
(
kfree@p(x)
|
kzfree@p(x)
|
__krealloc@p(x, ...)
|
krealloc@p(x, ...)
|
free_pages@p(x, ...)
|
free_page@p(x)
|
free_irq@p(x)
|
iounmap@p(x)
|
ioport_unmap@p(x)
)
@pb@
expression r.x;
position p;
position p != safe.p;
@@
(

6
scripts/coccinelle/null/deref_null.cocci
View file

@ -212,7 +212,7 @@ else S3
// The following three rules are duplicates of ifm, pr1 and pr2 respectively.
// It is need because the previous rule as already made a "change".
@ifm1@
@ifm1 depends on context && !org && !report@
expression *E;
statement S1,S2;
position p1;
@ -220,7 +220,7 @@ position p1;
if@p1 ((E == NULL && ...) || ...) S1 else S2
@pr11 expression@
@pr11 depends on context && !org && !report expression@
expression *ifm1.E;
identifier f;
position p1;
@ -228,7 +228,7 @@ position p1;
(E != NULL && ...) ? <+...E->f@p1...+> : ...
@pr12 expression@
@pr12 depends on context && !org && !report expression@
expression *ifm1.E;
identifier f;
position p2;

1
scripts/kconfig/.gitignore vendored
View file

@ -1,7 +1,6 @@
#
# Generated files
#
config*
*.lex.c
*.tab.c
*.tab.h

40
scripts/kconfig/conf.c
View file

@ -39,7 +39,6 @@ static enum input_mode input_mode = oldaskconfig;
static int indent = 1;
static int tty_stdio;
static int valid_stdin = 1;
static int sync_kconfig;
static int conf_cnt;
static char line[PATH_MAX];
@ -72,21 +71,14 @@ static void strip(char *str)
*p-- = 0;
}
static void check_stdin(void)
{
if (!valid_stdin) {
printf(_("aborted!\n\n"));
printf(_("Console input/output is redirected. "));
printf(_("Run 'make oldconfig' to update configuration.\n\n"));
exit(1);
}
}
/* Helper function to facilitate fgets() by Jean Sacren. */
static void xfgets(char *str, int size, FILE *in)
{
if (!fgets(str, size, in))
fprintf(stderr, "\nError in reading or end of file.\n");
if (!tty_stdio)
printf("%s", str);
}
static int conf_askvalue(struct symbol *sym, const char *def)
@ -113,13 +105,10 @@ static int conf_askvalue(struct symbol *sym, const char *def)
printf("%s\n", def);
return 0;
}
check_stdin();
/* fall through */
case oldaskconfig:
fflush(stdout);
xfgets(line, sizeof(line), stdin);
if (!tty_stdio)
printf("\n");
return 1;
default:
break;
@ -199,9 +188,7 @@ static int conf_sym(struct menu *menu)
printf("/m");
if (oldval != yes && sym_tristate_within_range(sym, yes))
printf("/y");
if (menu_has_help(menu))
printf("/?");
printf("] ");
printf("/?] ");
if (!conf_askvalue(sym, sym_get_string_value(sym)))
return 0;
strip(line);
@ -303,10 +290,7 @@ static int conf_choice(struct menu *menu)
printf("[1]: 1\n");
goto conf_childs;
}
printf("[1-%d", cnt);
if (menu_has_help(menu))
printf("?");
printf("]: ");
printf("[1-%d?]: ", cnt);
switch (input_mode) {
case oldconfig:
case silentoldconfig:
@ -315,7 +299,6 @@ static int conf_choice(struct menu *menu)
printf("%d\n", cnt);
break;
}
check_stdin();
/* fall through */
case oldaskconfig:
fflush(stdout);
@ -508,7 +491,7 @@ int main(int ac, char **av)
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
tty_stdio = isatty(0) && isatty(1) && isatty(2);
tty_stdio = isatty(0) && isatty(1);
while ((opt = getopt_long(ac, av, "s", long_opts, NULL)) != -1) {
if (opt == 's') {
@ -565,7 +548,7 @@ int main(int ac, char **av)
}
}
if (ac == optind) {
printf(_("%s: Kconfig file missing\n"), av[0]);
fprintf(stderr, _("%s: Kconfig file missing\n"), av[0]);
conf_usage(progname);
exit(1);
}
@ -590,9 +573,11 @@ int main(int ac, char **av)
if (!defconfig_file)
defconfig_file = conf_get_default_confname();
if (conf_read(defconfig_file)) {
printf(_("***\n"
"*** Can't find default configuration \"%s\"!\n"
"***\n"), defconfig_file);
fprintf(stderr,
_("***\n"
"*** Can't find default configuration \"%s\"!\n"
"***\n"),
defconfig_file);
exit(1);
}
break;
@ -650,7 +635,6 @@ int main(int ac, char **av)
return 1;
}
}
valid_stdin = tty_stdio;
}
switch (input_mode) {

2
scripts/kconfig/confdata.c
View file

@ -201,7 +201,7 @@ static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
if (new_size > *n) {
new_size += LINE_GROWTH - 1;
new_size *= 2;
nline = realloc(*lineptr, new_size);
nline = xrealloc(*lineptr, new_size);
if (!nline)
return -1;

4
scripts/kconfig/expr.c
View file

@ -94,7 +94,7 @@ struct expr *expr_copy(const struct expr *org)
e->right.expr = expr_copy(org->right.expr);
break;
default:
printf("can't copy type %d\n", e->type);
fprintf(stderr, "can't copy type %d\n", e->type);
free(e);
e = NULL;
break;
@ -127,7 +127,7 @@ void expr_free(struct expr *e)
expr_free(e->right.expr);
break;
default:
printf("how to free type %d?\n", e->type);
fprintf(stderr, "how to free type %d?\n", e->type);
break;
}
free(e);

1
scripts/kconfig/lkc.h
View file

@ -114,6 +114,7 @@ struct file *file_lookup(const char *name);
int file_write_dep(const char *name);
void *xmalloc(size_t size);
void *xcalloc(size_t nmemb, size_t size);
void *xrealloc(void *p, size_t size);
struct gstr {
size_t len;

2
scripts/kconfig/lkc_proto.h
View file

@ -31,7 +31,7 @@ extern struct symbol * symbol_hash[SYMBOL_HASHSIZE];
struct symbol * sym_lookup(const char *name, int flags);
struct symbol * sym_find(const char *name);
const char * sym_expand_string_value(const char *in);
char *sym_expand_string_value(const char *in);
const char * sym_escape_string_value(const char *in);
struct symbol ** sym_re_search(const char *pattern);
const char * sym_type_name(enum symbol_type type);

3
scripts/kconfig/nconf.gui.c
View file

@ -6,6 +6,7 @@
*
*/
#include "nconf.h"
#include "lkc.h"
/* a list of all the different widgets we use */
attributes_t attributes[ATTR_MAX+1] = {0};
@ -374,7 +375,7 @@ int dialog_inputbox(WINDOW *main_window,
if (strlen(init)+1 > *result_len) {
*result_len = strlen(init)+1;
*resultp = result = realloc(result, *result_len);
*resultp = result = xrealloc(result, *result_len);
}
/* find the widest line of msg: */

22
scripts/kconfig/symbol.c
View file

@ -371,11 +371,13 @@ void sym_calc_value(struct symbol *sym)
sym->curr.tri = no;
return;
}
if (!sym_is_choice_value(sym))
sym->flags &= ~SYMBOL_WRITE;
sym->flags &= ~SYMBOL_WRITE;
sym_calc_visibility(sym);
if (sym->visible != no)
sym->flags |= SYMBOL_WRITE;
/* set default if recursively called */
sym->curr = newval;
@ -390,7 +392,6 @@ void sym_calc_value(struct symbol *sym)
/* if the symbol is visible use the user value
* if available, otherwise try the default value
*/
sym->flags |= SYMBOL_WRITE;
if (sym_has_value(sym)) {
newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
sym->visible);
@ -433,12 +434,9 @@ void sym_calc_value(struct symbol *sym)
case S_STRING:
case S_HEX:
case S_INT:
if (sym->visible != no) {
sym->flags |= SYMBOL_WRITE;
if (sym_has_value(sym)) {
newval.val = sym->def[S_DEF_USER].val;
break;
}
if (sym->visible != no && sym_has_value(sym)) {
newval.val = sym->def[S_DEF_USER].val;
break;
}
prop = sym_get_default_prop(sym);
if (prop) {
@ -901,7 +899,7 @@ struct symbol *sym_find(const char *name)
* name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
* the empty string.
*/
const char *sym_expand_string_value(const char *in)
char *sym_expand_string_value(const char *in)
{
const char *src;
char *res;
@ -938,7 +936,7 @@ const char *sym_expand_string_value(const char *in)
newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
if (newlen > reslen) {
reslen = newlen;
res = realloc(res, reslen);
res = xrealloc(res, reslen);
}
strcat(res, symval);
@ -1223,7 +1221,7 @@ static struct symbol *sym_check_expr_deps(struct expr *e)
default:
break;
}
printf("Oops! How to check %d?\n", e->type);
fprintf(stderr, "Oops! How to check %d?\n", e->type);
return NULL;
}

15
scripts/kconfig/util.c
View file

@ -14,11 +14,11 @@
struct file *file_lookup(const char *name)
{
struct file *file;
const char *file_name = sym_expand_string_value(name);
char *file_name = sym_expand_string_value(name);
for (file = file_list; file; file = file->next) {
if (!strcmp(name, file->name)) {
free((void *)file_name);
free(file_name);
return file;
}
}
@ -104,7 +104,7 @@ void str_append(struct gstr *gs, const char *s)
if (s) {
l = strlen(gs->s) + strlen(s) + 1;
if (l > gs->len) {
gs->s = realloc(gs->s, l);
gs->s = xrealloc(gs->s, l);
gs->len = l;
}
strcat(gs->s, s);
@ -145,3 +145,12 @@ void *xcalloc(size_t nmemb, size_t size)
fprintf(stderr, "Out of memory.\n");
exit(1);
}
void *xrealloc(void *p, size_t size)
{
p = realloc(p, size);
if (p)
return p;
fprintf(stderr, "Out of memory.\n");
exit(1);
}

29
scripts/kconfig/zconf.l
View file

@ -52,7 +52,7 @@ static void append_string(const char *str, int size)
if (new_size > text_asize) {
new_size += START_STRSIZE - 1;
new_size &= -START_STRSIZE;
text = realloc(text, new_size);
text = xrealloc(text, new_size);
text_asize = new_size;
}
memcpy(text + text_size, str, size);
@ -184,7 +184,9 @@ n [A-Za-z0-9_-]
append_string(yytext, 1);
}
\n {
printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
fprintf(stderr,
"%s:%d:warning: multi-line strings not supported\n",
zconf_curname(), zconf_lineno());
current_file->lineno++;
BEGIN(INITIAL);
return T_EOL;
@ -294,7 +296,7 @@ void zconf_initscan(const char *name)
{
yyin = zconf_fopen(name);
if (!yyin) {
printf("can't find file %s\n", name);
fprintf(stderr, "can't find file %s\n", name);
exit(1);
}
@ -315,8 +317,8 @@ void zconf_nextfile(const char *name)
current_buf->state = YY_CURRENT_BUFFER;
yyin = zconf_fopen(file->name);
if (!yyin) {
printf("%s:%d: can't open file \"%s\"\n",
zconf_curname(), zconf_lineno(), file->name);
fprintf(stderr, "%s:%d: can't open file \"%s\"\n",
zconf_curname(), zconf_lineno(), file->name);
exit(1);
}
yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
@ -325,20 +327,21 @@ void zconf_nextfile(const char *name)
for (iter = current_file->parent; iter; iter = iter->parent ) {
if (!strcmp(current_file->name,iter->name) ) {
printf("%s:%d: recursive inclusion detected. "
"Inclusion path:\n current file : '%s'\n",
zconf_curname(), zconf_lineno(),
zconf_curname());
fprintf(stderr,
"%s:%d: recursive inclusion detected. "
"Inclusion path:\n current file : '%s'\n",
zconf_curname(), zconf_lineno(),
zconf_curname());
iter = current_file->parent;
while (iter && \
strcmp(iter->name,current_file->name)) {
printf(" included from: '%s:%d'\n",
iter->name, iter->lineno-1);
fprintf(stderr, " included from: '%s:%d'\n",
iter->name, iter->lineno-1);
iter = iter->parent;
}
if (iter)
printf(" included from: '%s:%d'\n",
iter->name, iter->lineno+1);
fprintf(stderr, " included from: '%s:%d'\n",
iter->name, iter->lineno+1);
exit(1);
}
}

6
scripts/kconfig/zconf.y
View file

@ -436,6 +436,12 @@ help: help_start T_HELPTEXT
zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used",
current_entry->sym->name ?: "<choice>");
}
/* Is the help text empty or all whitespace? */
if ($2[strspn($2, " \f\n\r\t\v")] == '\0')
zconfprint("warning: '%s' defined with blank help text",
current_entry->sym->name ?: "<choice>");
current_entry->help = $2;
};