On 12. 01. 23, 14:56, Greg Kroah-Hartman wrote:
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
commit 5a41237ad1d4b62008f93163af1d9b1da90729d8 upstream.
We had already disabled this warning for gcc-12 due to bugs in the value
range analysis, but it turns out we end up having some similar problems
with gcc-11.3 too, so let's disable it there too.
Older gcc versions end up being increasingly less relevant, and
hopefully clang and newer version of gcc (ie gcc-13) end up working
reliably enough that we still get the build coverage even when we
disable this for some versions.
No, this did not happen and I sent a patch for gcc 13 long time ago (it
was not applied):
https://lore.kernel.org/all/20221031114212.10266-1-jirislaby@xxxxxxxxxx/
So should we simply make it CC_IS_GCC && GCC_VERSION >= 110000 until
this gets resolved eventually?
Link: https://lore.kernel.org/all/20221227002941.GA2691687@xxxxxxxxxxxx/
Link: https://lore.kernel.org/all/D8BDBF66-E44C-45D4-9758-BAAA4F0C1998@xxxxxxxxxx/
Cc: Kees Cook <kees@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
init/Kconfig | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -892,13 +892,17 @@ config CC_IMPLICIT_FALLTHROUGH
default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5)
default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)
-# Currently, disable gcc-12 array-bounds globally.
+# Currently, disable gcc-11,12 array-bounds globally.
# We may want to target only particular configurations some day.
+config GCC11_NO_ARRAY_BOUNDS
+ def_bool y
+
config GCC12_NO_ARRAY_BOUNDS
def_bool y
config CC_NO_ARRAY_BOUNDS
bool
+ default y if CC_IS_GCC && GCC_VERSION >= 110000 && GCC_VERSION < 120000 && GCC11_NO_ARRAY_BOUNDS
default y if CC_IS_GCC && GCC_VERSION >= 120000 && GCC_VERSION < 130000 && GCC12_NO_ARRAY_BOUNDS
#
--
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