gcc: disable -Warray-bounds for gcc-11 too

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.

Link: https://lore.kernel.org/all/[email protected]/
Link: https://lore.kernel.org/all/[email protected]/
Cc: Kees Cook <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Guenter Roeck <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: torvalds

init/Kconfig

@@ -894,13 +894,17 @@ 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
 
 #