s390/kasan: remove obvious parameter with the only possible value

Kasan early code is only working on init_mm, remove unneeded pgd
parameter from kasan_copy_shadow and rename it to
kasan_copy_shadow_mapping.

Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h
index 528dfb9be77a3328752d0d780bfb5cedcf377871..0313f055f8c9507b38c32a0d4ba570e88191c9cd 100644 (file)
--- a/arch/s390/include/asm/kasan.h
+++ b/arch/s390/include/asm/kasan.h
@@ -12,12 +12,12 @@
 #define KASAN_SHADOW_END       (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
 
 extern void kasan_early_init(void);
-extern void kasan_copy_shadow(pgd_t *dst);
+extern void kasan_copy_shadow_mapping(void);
 extern void kasan_free_early_identity(void);
 extern unsigned long kasan_vmax;
 #else
 static inline void kasan_early_init(void) { }
-static inline void kasan_copy_shadow(pgd_t *dst) { }
+static inline void kasan_copy_shadow_mapping(void) { }
 static inline void kasan_free_early_identity(void) { }
 #endif
 

diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 77767850d0d073b00df8a9399052f3833a2e1f8a..69e6e2a5072ee2d8c9d27dc455047f3eda98f549 100644 (file)
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -105,7 +105,7 @@ void __init paging_init(void)
        S390_lowcore.user_asce = S390_lowcore.kernel_asce;
        crst_table_init((unsigned long *) init_mm.pgd, pgd_type);
        vmem_map_init();
-       kasan_copy_shadow(init_mm.pgd);
+       kasan_copy_shadow_mapping();
 
        /* enable virtual mapping in kernel mode */
        __ctl_load(S390_lowcore.kernel_asce, 1, 1);

diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c
index a43381f030d43bb86ca520529d1c504293caf481..a9f5614911101209c4a321a0d4205154dd618a0e 100644 (file)
--- a/arch/s390/mm/kasan_init.c
+++ b/arch/s390/mm/kasan_init.c
@@ -393,7 +393,7 @@ void __init kasan_early_init(void)
        sclp_early_printk("KernelAddressSanitizer initialized\n");
 }
 
-void __init kasan_copy_shadow(pgd_t *pg_dir)
+void __init kasan_copy_shadow_mapping(void)
 {
        /*
         * At this point we are still running on early pages setup early_pg_dir,
@@ -407,7 +407,7 @@ void __init kasan_copy_shadow(pgd_t *pg_dir)
        p4d_t *p4_dir_dst;
 
        pg_dir_src = pgd_offset_raw(early_pg_dir, KASAN_SHADOW_START);
-       pg_dir_dst = pgd_offset_raw(pg_dir, KASAN_SHADOW_START);
+       pg_dir_dst = pgd_offset_raw(init_mm.pgd, KASAN_SHADOW_START);
        p4_dir_src = p4d_offset(pg_dir_src, KASAN_SHADOW_START);
        p4_dir_dst = p4d_offset(pg_dir_dst, KASAN_SHADOW_START);
        memcpy(p4_dir_dst, p4_dir_src,