From: Heiko Carstens Date: Mon, 29 Jul 2024 13:45:58 +0000 (+0200) Subject: s390/mm: Get rid of RELOC_HIDE() X-Git-Tag: v6.12~751^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1e72ba5566d90a668c1c0fbde319cec03454fd20;p=platform%2Fkernel%2Flinux-amlogic.git s390/mm: Get rid of RELOC_HIDE() Since __va(0) does not translate to NULL anymore remove RELOC_HIDE() which was only added to get rid of a compile warning with clang W=1: arch/s390/mm/vmem.c:666:36: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 666 | __set_memory_4k(__va(0), __va(0) + ident_map_size); | ~~~~~~~ ^ Reviewed-by: Alexander Gordeev Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik --- diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 41c714e21292..4edb39e2adb7 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -670,14 +670,8 @@ void __init vmem_map_init(void) */ if (!static_key_enabled(&cpu_has_bear)) set_memory_x(0, 1); - if (debug_pagealloc_enabled()) { - /* - * Use RELOC_HIDE() as long as __va(0) translates to NULL, - * since performing pointer arithmetic on a NULL pointer - * has undefined behavior and generates compiler warnings. - */ - __set_memory_4k(__va(0), RELOC_HIDE(__va(0), ident_map_size)); - } + if (debug_pagealloc_enabled()) + __set_memory_4k(__va(0), __va(0) + ident_map_size); if (MACHINE_HAS_NX) system_ctl_set_bit(0, CR0_INSTRUCTION_EXEC_PROTECTION_BIT); pr_info("Write protected kernel read-only data: %luk\n",