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 <rppt@linux.ibm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Guo Ren <ren_guo@c-sky.com>				[c-sky]
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Juergen Gross <jgross@suse.com>			[Xen]
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c
index af5ada0..e83c046 100644 (file)
--- 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 6519252..a157890 100644 (file)
--- 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 74d148b..370bc34 100644 (file)
--- 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 0de4999..492f953 100644 (file)
--- 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 44f4b89..bd1cd4b 100644 (file)
--- 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 38940af..e7126ca 100644 (file)
--- 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;