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authorMatt Redfearn <matt.redfearn@imgtec.com>2017-07-19 11:21:03 +0300
committerRalf Baechle <ralf@linux-mips.org>2017-08-29 16:21:50 +0300
commitff2c8252bfbf069dda1e53353a63b560f1369f59 (patch)
treeb10fda83d91044b16b00775ffa648e1f4136732e /arch/mips/fw
parentb879c801b38318d4c8fb13069d7aea0ffca49c59 (diff)
downloadlinux-ff2c8252bfbf069dda1e53353a63b560f1369f59.tar.xz
MIPS: SMP: Constify smp ops
smp_ops providers do not modify their ops structures, so they should be made const for robustness. Since currently the MIPS kernel is not mapped with memory protection, this does not in itself provide any security benefit, but it still makes sense to make this change. There are also slight code size efficincies from the structure being made read-only, saving 128 bytes of kernel text on a pistachio_defconfig. Before: text data bss dec hex filename 7187239 1772752 470224 9430215 8fe4c7 vmlinux After: text data bss dec hex filename 7187111 1772752 470224 9430087 8fe447 vmlinux Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Doug Ledford <dledford@redhat.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Joe Perches <joe@perches.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Steven J. Hill <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16784/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/fw')
-rw-r--r--arch/mips/fw/arc/init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/fw/arc/init.c b/arch/mips/fw/arc/init.c
index 629b24db0d3a..008555969534 100644
--- a/arch/mips/fw/arc/init.c
+++ b/arch/mips/fw/arc/init.c
@@ -51,7 +51,7 @@ void __init prom_init(void)
#endif
#ifdef CONFIG_SGI_IP27
{
- extern struct plat_smp_ops ip27_smp_ops;
+ extern const struct plat_smp_ops ip27_smp_ops;
register_smp_ops(&ip27_smp_ops);
}