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Kconfig.debug: ensure early check for KMSAN in CONFIG_KMSAN_WARN
As pointed out by Masahiro Yamada, Kconfig picks up the first default
entry which has true 'if' condition. Hence, the previously added check
for KMSAN was never used, because it followed the checks for 64BIT and
!64BIT.
Put KMSAN check before others to ensure it is always applied.
Link: https://lkml.kernel.org/r/20221102110611.1085175-3-glider@google.com
Link: https://github.com/google/kmsan/issues/89
Link: https://lore.kernel.org/linux-mm/20221024212144.2852069-3-glider@google.com/
Fixes: 921757bc9b
("Kconfig.debug: disable CONFIG_FRAME_WARN for KMSAN by default")
Signed-off-by: Alexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Marco Elver <elver@google.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -395,12 +395,12 @@ endif # DEBUG_INFO
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config FRAME_WARN
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int "Warn for stack frames larger than"
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range 0 8192
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default 0 if KMSAN
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default 2048 if GCC_PLUGIN_LATENT_ENTROPY
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default 2048 if PARISC
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default 1536 if (!64BIT && XTENSA)
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default 1024 if !64BIT
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default 2048 if 64BIT
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default 0 if KMSAN
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help
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Tell the compiler to warn at build time for stack frames larger than this.
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Setting this too low will cause a lot of warnings.
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