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Message-ID: <20181206140716.apapnpmdk3nrn7i3@holly.lan>
Date: Thu, 6 Dec 2018 14:07:16 +0000
From: Daniel Thompson <daniel.thompson@...aro.org>
To: Christophe Leroy <christophe.leroy@....fr>
Cc: Vineet Gupta <vgupta@...opsys.com>,
Russell King <linux@...linux.org.uk>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Yoshinori Sato <ysato@...rs.sourceforge.jp>,
Richard Kuo <rkuo@...eaurora.org>,
Michal Simek <monstr@...str.eu>,
Ralf Baechle <ralf@...ux-mips.org>,
Paul Burton <paul.burton@...s.com>,
James Hogan <jhogan@...nel.org>,
Ley Foon Tan <lftan@...era.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>,
Rich Felker <dalias@...c.org>,
"David S. Miller" <davem@...emloft.net>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
x86@...nel.org, Jason Wessel <jason.wessel@...driver.com>,
Douglas Anderson <dianders@...omium.org>,
Randy Dunlap <rdunlap@...radead.org>,
"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
linux-snps-arc@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
uclinux-h8-devel@...ts.sourceforge.jp,
linux-hexagon@...r.kernel.org, linux-mips@...r.kernel.org,
nios2-dev@...ts.rocketboards.org, linuxppc-dev@...ts.ozlabs.org,
linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
kgdb-bugreport@...ts.sourceforge.net
Subject: Re: [PATCH 2/2] kgdb/treewide: constify struct kgdb_arch
arch_kgdb_ops
On Wed, Dec 05, 2018 at 04:41:11AM +0000, Christophe Leroy wrote:
> checkpatch.pl reports the following:
>
> WARNING: struct kgdb_arch should normally be const
> #28: FILE: arch/mips/kernel/kgdb.c:397:
> +struct kgdb_arch arch_kgdb_ops = {
>
> This report makes sense, as all other ops struct, this
> one should also be const. This patch does the change.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
Acked-by: Daniel Thompson <daniel.thompson@...aro.org>
Similar to https://patchwork.kernel.org/patch/10701129/ I would be more
comfortable to see a resend with the relevant arch maintainers
explicitly called out with a Cc: entry here.
> ---
> arch/arc/kernel/kgdb.c | 2 +-
> arch/arm/kernel/kgdb.c | 2 +-
> arch/arm64/kernel/kgdb.c | 2 +-
> arch/h8300/kernel/kgdb.c | 2 +-
> arch/hexagon/kernel/kgdb.c | 2 +-
> arch/microblaze/kernel/kgdb.c | 2 +-
> arch/mips/kernel/kgdb.c | 2 +-
> arch/nios2/kernel/kgdb.c | 2 +-
> arch/powerpc/kernel/kgdb.c | 2 +-
> arch/sh/kernel/kgdb.c | 2 +-
> arch/sparc/kernel/kgdb_32.c | 2 +-
> arch/sparc/kernel/kgdb_64.c | 2 +-
> arch/x86/kernel/kgdb.c | 2 +-
> include/linux/kgdb.h | 2 +-
> 14 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/arch/arc/kernel/kgdb.c b/arch/arc/kernel/kgdb.c
> index 9a3c34af2ae8..bfd04b442e36 100644
> --- a/arch/arc/kernel/kgdb.c
> +++ b/arch/arc/kernel/kgdb.c
> @@ -204,7 +204,7 @@ void kgdb_roundup_cpus(unsigned long flags)
> local_irq_disable();
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* breakpoint instruction: TRAP_S 0x3 */
> #ifdef CONFIG_CPU_BIG_ENDIAN
> .gdb_bpt_instr = {0x78, 0x7e},
> diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
> index caa0dbe3dc61..21a6d5958955 100644
> --- a/arch/arm/kernel/kgdb.c
> +++ b/arch/arm/kernel/kgdb.c
> @@ -274,7 +274,7 @@ int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
> * and we handle the normal undef case within the do_undefinstr
> * handler.
> */
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> #ifndef __ARMEB__
> .gdb_bpt_instr = {0xfe, 0xde, 0xff, 0xe7}
> #else /* ! __ARMEB__ */
> diff --git a/arch/arm64/kernel/kgdb.c b/arch/arm64/kernel/kgdb.c
> index a20de58061a8..fe1d1f935b90 100644
> --- a/arch/arm64/kernel/kgdb.c
> +++ b/arch/arm64/kernel/kgdb.c
> @@ -357,7 +357,7 @@ void kgdb_arch_exit(void)
> unregister_die_notifier(&kgdb_notifier);
> }
>
> -struct kgdb_arch arch_kgdb_ops;
> +const struct kgdb_arch arch_kgdb_ops;
>
> int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
> {
> diff --git a/arch/h8300/kernel/kgdb.c b/arch/h8300/kernel/kgdb.c
> index 1a1d30cb0609..602e478afbd5 100644
> --- a/arch/h8300/kernel/kgdb.c
> +++ b/arch/h8300/kernel/kgdb.c
> @@ -129,7 +129,7 @@ void kgdb_arch_exit(void)
> /* Nothing to do */
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* Breakpoint instruction: trapa #2 */
> .gdb_bpt_instr = { 0x57, 0x20 },
> };
> diff --git a/arch/hexagon/kernel/kgdb.c b/arch/hexagon/kernel/kgdb.c
> index 16c24b22d0b2..f1924d483e78 100644
> --- a/arch/hexagon/kernel/kgdb.c
> +++ b/arch/hexagon/kernel/kgdb.c
> @@ -83,7 +83,7 @@ struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = {
> { "syscall_nr", GDB_SIZEOF_REG, offsetof(struct pt_regs, syscall_nr)},
> };
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* trap0(#0xDB) 0x0cdb0054 */
> .gdb_bpt_instr = {0x54, 0x00, 0xdb, 0x0c},
> };
> diff --git a/arch/microblaze/kernel/kgdb.c b/arch/microblaze/kernel/kgdb.c
> index 6366f69d118e..130cd0f064ce 100644
> --- a/arch/microblaze/kernel/kgdb.c
> +++ b/arch/microblaze/kernel/kgdb.c
> @@ -143,7 +143,7 @@ void kgdb_arch_exit(void)
> /*
> * Global data
> */
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> #ifdef __MICROBLAZEEL__
> .gdb_bpt_instr = {0x18, 0x00, 0x0c, 0xba}, /* brki r16, 0x18 */
> #else
> diff --git a/arch/mips/kernel/kgdb.c b/arch/mips/kernel/kgdb.c
> index 31eff1bec577..edfdc2ec2d16 100644
> --- a/arch/mips/kernel/kgdb.c
> +++ b/arch/mips/kernel/kgdb.c
> @@ -394,7 +394,7 @@ int kgdb_arch_handle_exception(int vector, int signo, int err_code,
> return -1;
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> #ifdef CONFIG_CPU_BIG_ENDIAN
> .gdb_bpt_instr = { spec_op << 2, 0x00, 0x00, break_op },
> #else
> diff --git a/arch/nios2/kernel/kgdb.c b/arch/nios2/kernel/kgdb.c
> index 117859122d1c..37b25f844a2d 100644
> --- a/arch/nios2/kernel/kgdb.c
> +++ b/arch/nios2/kernel/kgdb.c
> @@ -165,7 +165,7 @@ void kgdb_arch_exit(void)
> /* Nothing to do */
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* Breakpoint instruction: trap 30 */
> .gdb_bpt_instr = { 0xba, 0x6f, 0x3b, 0x00 },
> };
> diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c
> index 59c578f865aa..bdb588b1d8fb 100644
> --- a/arch/powerpc/kernel/kgdb.c
> +++ b/arch/powerpc/kernel/kgdb.c
> @@ -477,7 +477,7 @@ int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
> /*
> * Global data
> */
> -struct kgdb_arch arch_kgdb_ops;
> +const struct kgdb_arch arch_kgdb_ops;
>
> static int kgdb_not_implemented(struct pt_regs *regs)
> {
> diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
> index 4f04c6638a4d..a24c48446e98 100644
> --- a/arch/sh/kernel/kgdb.c
> +++ b/arch/sh/kernel/kgdb.c
> @@ -382,7 +382,7 @@ void kgdb_arch_exit(void)
> unregister_die_notifier(&kgdb_notifier);
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* Breakpoint instruction: trapa #0x3c */
> #ifdef CONFIG_CPU_LITTLE_ENDIAN
> .gdb_bpt_instr = { 0x3c, 0xc3 },
> diff --git a/arch/sparc/kernel/kgdb_32.c b/arch/sparc/kernel/kgdb_32.c
> index 639c8e54530a..7580775a14b9 100644
> --- a/arch/sparc/kernel/kgdb_32.c
> +++ b/arch/sparc/kernel/kgdb_32.c
> @@ -166,7 +166,7 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
> regs->npc = regs->pc + 4;
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* Breakpoint instruction: ta 0x7d */
> .gdb_bpt_instr = { 0x91, 0xd0, 0x20, 0x7d },
> };
> diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c
> index a68bbddbdba4..5d6c2d287e85 100644
> --- a/arch/sparc/kernel/kgdb_64.c
> +++ b/arch/sparc/kernel/kgdb_64.c
> @@ -195,7 +195,7 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
> regs->tnpc = regs->tpc + 4;
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* Breakpoint instruction: ta 0x72 */
> .gdb_bpt_instr = { 0x91, 0xd0, 0x20, 0x72 },
> };
> diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
> index 8e36f249646e..e7effc02f13c 100644
> --- a/arch/x86/kernel/kgdb.c
> +++ b/arch/x86/kernel/kgdb.c
> @@ -804,7 +804,7 @@ int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
> (char *)bpt->saved_instr, BREAK_INSTR_SIZE);
> }
>
> -struct kgdb_arch arch_kgdb_ops = {
> +const struct kgdb_arch arch_kgdb_ops = {
> /* Breakpoint instruction: */
> .gdb_bpt_instr = { 0xcc },
> .flags = KGDB_HW_BREAKPOINT,
> diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
> index e465bb15912d..3bf313311cca 100644
> --- a/include/linux/kgdb.h
> +++ b/include/linux/kgdb.h
> @@ -281,7 +281,7 @@ struct kgdb_io {
> int is_console;
> };
>
> -extern struct kgdb_arch arch_kgdb_ops;
> +extern const struct kgdb_arch arch_kgdb_ops;
>
> extern unsigned long kgdb_arch_pc(int exception, struct pt_regs *regs);
>
> --
> 2.13.3
>
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