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s390: Handle KCOV __init vs inline mismatches 

When KCOV is enabled all functions get instrumented, unless
the __no_sanitize_coverage attribute is used. To prepare for
__no_sanitize_coverage being applied to __init functions, we have to
handle differences in how GCC's inline optimizations get resolved. For
s390 this exposed a place where the __init annotation was missing but
ended up being "accidentally correct". Fix this cases and force a couple
functions to be inline with __always_inline.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/20250717232519.2984886-7-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
This commit is contained in:
Kees Cook 2025-07-17 16:25:12 -07:00
parent 2424fe1cac
commit c64d6be1a6
3 changed files with 3 additions and 3 deletions
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2
arch/s390/hypfs/hypfs.h
View File

@ -48,7 +48,7 @@ void hypfs_sprp_exit(void);
int __hypfs_fs_init(void);
static inline int hypfs_fs_init(void)
static __always_inline int hypfs_fs_init(void)
{
if (IS_ENABLED(CONFIG_S390_HYPFS_FS))
return __hypfs_fs_init();

2
arch/s390/hypfs/hypfs_diag.h
View File

@ -19,7 +19,7 @@ int diag204_store(void *buf, int pages);
int __hypfs_diag_fs_init(void);
void __hypfs_diag_fs_exit(void);
static inline int hypfs_diag_fs_init(void)
static __always_inline int hypfs_diag_fs_init(void)
{
if (IS_ENABLED(CONFIG_S390_HYPFS_FS))
return __hypfs_diag_fs_init();

2
arch/s390/mm/init.c
View File

@ -142,7 +142,7 @@ bool force_dma_unencrypted(struct device *dev)
}
/* protected virtualization */
static void pv_init(void)
static void __init pv_init(void)
{
if (!is_prot_virt_guest())
return;