From: "Yann E. MORIN" <[email protected]>
When a symbol changes type from tristate to bool, and was previously set to
'm', a subsequent silentoldconfig would warn about inconsistency, such as:
include/config/auto.conf:3014:warning: symbol value 'm' invalid for
HOTPLUG_PCI_PCIE
Seen by Linus with the merge in aa8032b (sequence to reproduce by Michal):
git checkout 1fe0135
make mrproper
make allmodconfig
make silentoldconfig
git checkout aa8032b
make allmodconfig
make silentoldconfig
Since HOTPLUG_PCI_PCIE changed from tristate to bool in aa8032b, it was
previously set to 'm' in auto.conf by the first allmodconfig+silentoldconfig,
but then was set to 'y' by the second allmodconfig. Then the second
silentoldconfig prints the warning.
The warning in this case is a spurious warning, which happens at the time
kconfig tries to detect symbols that have changed, to touch the empty
header files in include/config used for dependency-tracking by make.
Silence the warning when we read the old auto.conf file, since it is
perfectly legit that a symbol changed type since the previous call.
Thread in:
http://marc.info/?l=linux-pci&m=137569198904000&w=2
Reported-by: Linus Torvalds <[email protected]>
Signed-off-by: "Yann E. MORIN" <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Thomas Petazzoni <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Yinghai Lu <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
---
scripts/kconfig/confdata.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index c55c227..87f7238 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -140,7 +140,9 @@ static int conf_set_sym_val(struct symbol *sym, int def,
int def_flags, char *p)
sym->flags |= def_flags;
break;
}
- conf_warning("symbol value '%s' invalid for %s", p, sym->name);
+ if (def != S_DEF_AUTO)
+ conf_warning("symbol value '%s' invalid for %s",
+ p, sym->name);
return 1;
case S_OTHER:
if (*p != '"') {
@@ -161,7 +163,8 @@ static int conf_set_sym_val(struct symbol *sym, int def,
int def_flags, char *p)
memmove(p2, p2 + 1, strlen(p2));
}
if (!p2) {
- conf_warning("invalid string found");
+ if (def != S_DEF_AUTO)
+ conf_warning("invalid string found");
return 1;
}
/* fall through */
@@ -172,7 +175,9 @@ static int conf_set_sym_val(struct symbol *sym, int def,
int def_flags, char *p)
sym->def[def].val = strdup(p);
sym->flags |= def_flags;
} else {
- conf_warning("symbol value '%s' invalid for %s", p,
sym->name);
+ if (def != S_DEF_AUTO)
+ conf_warning("symbol value '%s' invalid for %s",
+ p, sym->name);
return 1;
}
break;
--
1.8.1.2
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