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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-06-10 17:43:43 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-06-19 13:57:56 +0200 |
| commit | ca5dabcff1df6bc8c413922b5fa63cc602858803 (patch) | |
| tree | c57c2d398f1d4d9e47d78dadd3eb0d5af0b4f02a /arch | |
| parent | powerpc/rtas: Allow ibm,platform-dump RTAS call with null buffer address (diff) | |
| download | linux-ca5dabcff1df6bc8c413922b5fa63cc602858803.tar.xz linux-ca5dabcff1df6bc8c413922b5fa63cc602858803.zip | |
powerpc/prom_init: Fix build failure with GCC_PLUGIN_STRUCTLEAK_BYREF_ALL and KASAN
When CONFIG_KASAN is selected, we expect prom_init to use __memset()
because it is too early to use memset().
But with CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL, the compiler adds calls
to memset() to clear objects on stack, hence the following failure:
PROMCHK arch/powerpc/kernel/prom_init_check
Error: External symbol 'memset' referenced from prom_init.c
make[2]: *** [arch/powerpc/kernel/Makefile:204 : arch/powerpc/kernel/prom_init_check] Erreur 1
prom_find_machine_type() is called from prom_init() and is called only
once, so lets put compat[] in BSS instead of stack to avoid that.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3802811f7cf94f730be44688539c01bba3a3b5c0.1654875808.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 04694ec423f6..13d6cb188835 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -2302,7 +2302,7 @@ static void __init prom_init_stdout(void) static int __init prom_find_machine_type(void) { - char compat[256]; + static char compat[256] __prombss; int len, i = 0; #ifdef CONFIG_PPC64 phandle rtas; |