From 350e88bad4964da6feabee02a1a70381bcdb087e Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Mon, 13 May 2019 17:22:59 -0700 Subject: mm: memblock: make keeping memblock memory opt-in rather than opt-out Most architectures do not need the memblock memory after the page allocator is initialized, but only few enable ARCH_DISCARD_MEMBLOCK in the arch Kconfig. Replacing ARCH_DISCARD_MEMBLOCK with ARCH_KEEP_MEMBLOCK and inverting the logic makes it clear which architectures actually use memblock after system initialization and skips the necessity to add ARCH_DISCARD_MEMBLOCK to the architectures that are still missing that option. Link: http://lkml.kernel.org/r/1556102150-32517-1-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport Acked-by: Michael Ellerman (powerpc) Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Richard Kuo Cc: Tony Luck Cc: Fenghua Yu Cc: Geert Uytterhoeven Cc: Ralf Baechle Cc: Paul Burton Cc: James Hogan Cc: Ley Foon Tan Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Yoshinori Sato Cc: Rich Felker Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Eric Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/Kconfig | 2 +- mm/memblock.c | 6 +++--- mm/page_alloc.c | 3 +-- 3 files changed, 5 insertions(+), 6 deletions(-) (limited to 'mm') diff --git a/mm/Kconfig b/mm/Kconfig index 71e697e693df..c5124c2cb0b2 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -136,7 +136,7 @@ config HAVE_MEMBLOCK_PHYS_MAP config HAVE_GENERIC_GUP bool -config ARCH_DISCARD_MEMBLOCK +config ARCH_KEEP_MEMBLOCK bool config MEMORY_ISOLATION diff --git a/mm/memblock.c b/mm/memblock.c index f315eca9f4a1..6bbad46f4d2c 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -94,7 +94,7 @@ * :c:func:`mem_init` function frees all the memory to the buddy page * allocator. * - * If an architecure enables %CONFIG_ARCH_DISCARD_MEMBLOCK, the + * Unless an architecure enables %CONFIG_ARCH_KEEP_MEMBLOCK, the * memblock data structures will be discarded after the system * initialization compltes. */ @@ -375,7 +375,7 @@ static void __init_memblock memblock_remove_region(struct memblock_type *type, u } } -#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK +#ifndef CONFIG_ARCH_KEEP_MEMBLOCK /** * memblock_discard - discard memory and reserved arrays if they were allocated */ @@ -1987,7 +1987,7 @@ unsigned long __init memblock_free_all(void) return pages; } -#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) +#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) static int memblock_debug_show(struct seq_file *m, void *private) { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index cbda9aea0bf5..f2f3fb4921d1 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1896,10 +1896,9 @@ void __init page_alloc_init_late(void) /* Reinit limits that are based on free pages after the kernel is up */ files_maxfiles_init(); #endif -#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK + /* Discard memblock private memory */ memblock_discard(); -#endif for_each_populated_zone(zone) set_zone_contiguous(zone); -- cgit v1.2.3