From 0240dfd5b4de79980a484cef8ddf0d52d52bce40 Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Mon, 11 Mar 2019 23:29:56 -0700 Subject: arch: don't memset(0) memory returned by memblock_alloc() memblock_alloc() already clears the allocated memory, no point in doing it twice. Link: http://lkml.kernel.org/r/1548057848-15136-14-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport Acked-by: Geert Uytterhoeven [m68k] Cc: Catalin Marinas Cc: Christophe Leroy Cc: Christoph Hellwig Cc: "David S. Miller" Cc: Dennis Zhou Cc: Greentime Hu Cc: Greg Kroah-Hartman Cc: Guan Xuetao Cc: Guo Ren Cc: Guo Ren [c-sky] Cc: Heiko Carstens Cc: Juergen Gross [Xen] Cc: Mark Salter Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Paul Burton Cc: Petr Mladek Cc: Richard Weinberger Cc: Rich Felker Cc: Rob Herring Cc: Rob Herring Cc: Russell King Cc: Stafford Horne Cc: Tony Luck Cc: Vineet Gupta Cc: Yoshinori Sato Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/c6x/mm/init.c | 1 - arch/h8300/mm/init.c | 1 - arch/ia64/kernel/mca.c | 2 -- arch/m68k/mm/mcfmmu.c | 1 - arch/microblaze/mm/init.c | 6 ++---- arch/sparc/kernel/prom_32.c | 2 -- 6 files changed, 2 insertions(+), 11 deletions(-) (limited to 'arch') diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c index af5ada0520be..e83c04654238 100644 --- a/arch/c6x/mm/init.c +++ b/arch/c6x/mm/init.c @@ -40,7 +40,6 @@ void __init paging_init(void) empty_zero_page = (unsigned long) memblock_alloc(PAGE_SIZE, PAGE_SIZE); - memset((void *)empty_zero_page, 0, PAGE_SIZE); /* * Set up user data space diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c index 6519252ac4db..a1578904ad4e 100644 --- a/arch/h8300/mm/init.c +++ b/arch/h8300/mm/init.c @@ -68,7 +68,6 @@ void __init paging_init(void) * to a couple of allocated pages. */ empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE, PAGE_SIZE); - memset((void *)empty_zero_page, 0, PAGE_SIZE); /* * Set up SFC/DFC registers (user data space). diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 74d148bd4876..370bc349619a 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -400,8 +400,6 @@ ia64_log_init(int sal_info_type) // set up OS data structures to hold error info IA64_LOG_ALLOCATE(sal_info_type, max_size); - memset(IA64_LOG_CURR_BUFFER(sal_info_type), 0, max_size); - memset(IA64_LOG_NEXT_BUFFER(sal_info_type), 0, max_size); } /* diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c index 0de4999a3810..492f953db31b 100644 --- a/arch/m68k/mm/mcfmmu.c +++ b/arch/m68k/mm/mcfmmu.c @@ -44,7 +44,6 @@ void __init paging_init(void) int i; empty_zero_page = (void *) memblock_alloc(PAGE_SIZE, PAGE_SIZE); - memset((void *) empty_zero_page, 0, PAGE_SIZE); pg_dir = swapper_pg_dir; memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 44f4b8910c21..bd1cd4bff449 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -376,10 +376,8 @@ void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask) if (mem_init_done) p = kzalloc(size, mask); - else { + else p = memblock_alloc(size, SMP_CACHE_BYTES); - if (p) - memset(p, 0, size); - } + return p; } diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c index 38940afaa696..e7126ca4ead7 100644 --- a/arch/sparc/kernel/prom_32.c +++ b/arch/sparc/kernel/prom_32.c @@ -33,8 +33,6 @@ void * __init prom_early_alloc(unsigned long size) void *ret; ret = memblock_alloc(size, SMP_CACHE_BYTES); - if (ret != NULL) - memset(ret, 0, size); prom_early_allocated += size; -- cgit v1.2.3