• Matt Redfearn's avatar
    MIPS: SMP: Constify smp ops · ff2c8252
    Matt Redfearn authored
    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: default avatarMatt 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: default avatarRalf Baechle <ralf@linux-mips.org>
    ff2c8252
smp.c 24.9 KB