diff options
| author | Matt Redfearn <matt.redfearn@imgtec.com> | 2017-07-19 10:21:03 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-08-29 15:21:50 +0200 |
| commit | ff2c8252bfbf069dda1e53353a63b560f1369f59 (patch) | |
| tree | b10fda83d91044b16b00775ffa648e1f4136732e /arch/mips/sibyte | |
| parent | MIPS: defconfig: Cleanup from non-existing options (diff) | |
| download | linux-ff2c8252bfbf069dda1e53353a63b560f1369f59.tar.xz linux-ff2c8252bfbf069dda1e53353a63b560f1369f59.zip | |
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/sibyte')
| -rw-r--r-- | arch/mips/sibyte/bcm1480/smp.c | 2 | ||||
| -rw-r--r-- | arch/mips/sibyte/common/cfe.c | 4 | ||||
| -rw-r--r-- | arch/mips/sibyte/sb1250/smp.c | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/arch/mips/sibyte/bcm1480/smp.c b/arch/mips/sibyte/bcm1480/smp.c index d0e94ffcc1b8..20091d5fe5a1 100644 --- a/arch/mips/sibyte/bcm1480/smp.c +++ b/arch/mips/sibyte/bcm1480/smp.c @@ -157,7 +157,7 @@ static void __init bcm1480_prepare_cpus(unsigned int max_cpus) { } -struct plat_smp_ops bcm1480_smp_ops = { +const struct plat_smp_ops bcm1480_smp_ops = { .send_ipi_single = bcm1480_send_ipi_single, .send_ipi_mask = bcm1480_send_ipi_mask, .init_secondary = bcm1480_init_secondary, diff --git a/arch/mips/sibyte/common/cfe.c b/arch/mips/sibyte/common/cfe.c index c1a11a11db7f..115399202eab 100644 --- a/arch/mips/sibyte/common/cfe.c +++ b/arch/mips/sibyte/common/cfe.c @@ -229,8 +229,8 @@ static int __init initrd_setup(char *str) #endif -extern struct plat_smp_ops sb_smp_ops; -extern struct plat_smp_ops bcm1480_smp_ops; +extern const struct plat_smp_ops sb_smp_ops; +extern const struct plat_smp_ops bcm1480_smp_ops; /* * prom_init is called just after the cpu type is determined, from setup_arch() diff --git a/arch/mips/sibyte/sb1250/smp.c b/arch/mips/sibyte/sb1250/smp.c index 0a4a2c3982d8..46ce1298c27d 100644 --- a/arch/mips/sibyte/sb1250/smp.c +++ b/arch/mips/sibyte/sb1250/smp.c @@ -146,7 +146,7 @@ static void __init sb1250_prepare_cpus(unsigned int max_cpus) { } -struct plat_smp_ops sb_smp_ops = { +const struct plat_smp_ops sb_smp_ops = { .send_ipi_single = sb1250_send_ipi_single, .send_ipi_mask = sb1250_send_ipi_mask, .init_secondary = sb1250_init_secondary, |