kasan_init() maps each memblock region with for_each_mem_range() and passes it to kasan_init_phys_region(), which does nothing when start >= end. for_each_mem_range() never returns an invalid range, so start < end always.
Therefore the start >= end check is unreachable, so remove it. No functional change. Signed-off-by: Sang-Heon Jeon <[email protected]> --- This patch is similar to my earlier series [1] that removed unreachable invalid range checks in memblock iteration loops. I just missed it at the time. [1] https://lore.kernel.org/all/[email protected]/ --- arch/powerpc/mm/kasan/init_book3e_64.c | 3 --- arch/powerpc/mm/kasan/init_book3s_64.c | 3 --- 2 files changed, 6 deletions(-) diff --git a/arch/powerpc/mm/kasan/init_book3e_64.c b/arch/powerpc/mm/kasan/init_book3e_64.c index 0d3a73d6d4b0..0ed372fb8b09 100644 --- a/arch/powerpc/mm/kasan/init_book3e_64.c +++ b/arch/powerpc/mm/kasan/init_book3e_64.c @@ -68,9 +68,6 @@ static void __init kasan_init_phys_region(void *start, void *end) unsigned long k_start, k_end, k_cur; void *va; - if (start >= end) - return; - k_start = ALIGN_DOWN((unsigned long)kasan_mem_to_shadow(start), PAGE_SIZE); k_end = ALIGN((unsigned long)kasan_mem_to_shadow(end), PAGE_SIZE); diff --git a/arch/powerpc/mm/kasan/init_book3s_64.c b/arch/powerpc/mm/kasan/init_book3s_64.c index dcafa641804c..ccfbfb894637 100644 --- a/arch/powerpc/mm/kasan/init_book3s_64.c +++ b/arch/powerpc/mm/kasan/init_book3s_64.c @@ -24,9 +24,6 @@ static void __init kasan_init_phys_region(void *start, void *end) unsigned long k_start, k_end, k_cur; void *va; - if (start >= end) - return; - k_start = ALIGN_DOWN((unsigned long)kasan_mem_to_shadow(start), PAGE_SIZE); k_end = ALIGN((unsigned long)kasan_mem_to_shadow(end), PAGE_SIZE); -- 2.43.0
