linux-kernel - Re: [PATCH v3] MIPS: Fix build breakage caused by header file changes

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Date:   Mon, 6 Mar 2017 23:20:20 +0000
From:   James Hogan <james.hogan@...tec.com>
To:     Guenter Roeck <linux@...ck-us.net>
CC:     Ralf Baechle <ralf@...ux-mips.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        <linux-mips@...ux-mips.org>, <linux-kernel@...r.kernel.org>,
        <linux-crypto@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH v3] MIPS: Fix build breakage caused by header file changes

Hi Guenter,

On Mon, Mar 06, 2017 at 11:13:55AM -0800, Guenter Roeck wrote:
> Since commit f3ac60671954 ("sched/headers: Move task-stack related
> APIs from <linux/sched.h> to <linux/sched/task_stack.h>") and commit
> f780d89a0e82 ("sched/headers: Remove <asm/ptrace.h> from
> <linux/sched.h>"), various mips builds fail as follows.
> 
> arch/mips/kernel/smp-mt.c: In function ‘vsmp_boot_secondary’:
> arch/mips/include/asm/processor.h:384:41: error:
> 	implicit declaration of function ‘task_stack_page’
> 
> In file included from
> 	/opt/buildbot/slave/hwmon-testing/build/arch/mips/kernel/pm.c:
> arch/mips/include/asm/fpu.h: In function '__own_fpu':
> arch/mips/include/asm/processor.h:385:31: error:
> 	invalid application of 'sizeof' to incomplete type 'struct pt_regs'

This one is in an inline function, so I think it'd affect multiple
includes of <asm/fpu.h> even if __own_fpu isn't used, so I think the
following patch which adds the include ptrace.h in fpu.h is more robust
than adding to the individual c files affected:
https://patchwork.linux-mips.org/patch/15386/

Admitedly it could probably have a more specific subject line since
there are more similar errors.

Cheers
James

> 
> arch/mips/netlogic/common/smp.c: In function 'nlm_boot_secondary':
> arch/mips/netlogic/common/smp.c:157:2: error:
> 	implicit declaration of function 'task_stack_page'
> 
> and more similar errors.
> 
> Fixes: f3ac60671954 ("sched/headers: Move task-stack related APIs ...")
> Fixes: f780d89a0e82 ("sched/headers: Remove <asm/ptrace.h> from ...")
> Cc: Ingo Molnar <mingo@...nel.org>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> ---
> v3: Catch more build errors
> 
>  arch/mips/cavium-octeon/cpu.c                  | 3 ++-
>  arch/mips/cavium-octeon/crypto/octeon-crypto.c | 1 +
>  arch/mips/cavium-octeon/smp.c                  | 2 +-
>  arch/mips/kernel/pm.c                          | 1 +
>  arch/mips/kernel/smp-mt.c                      | 2 +-
>  arch/mips/netlogic/common/smp.c                | 1 +
>  arch/mips/netlogic/xlp/cop2-ex.c               | 3 ++-
>  arch/mips/power/cpu.c                          | 1 +
>  8 files changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/mips/cavium-octeon/cpu.c b/arch/mips/cavium-octeon/cpu.c
> index a5b427909b5c..b826b7a87c57 100644
> --- a/arch/mips/cavium-octeon/cpu.c
> +++ b/arch/mips/cavium-octeon/cpu.c
> @@ -10,7 +10,8 @@
>  #include <linux/irqflags.h>
>  #include <linux/notifier.h>
>  #include <linux/prefetch.h>
> -#include <linux/sched.h>
> +#include <linux/ptrace.h>
> +#include <linux/sched/task_stack.h>
>  
>  #include <asm/cop2.h>
>  #include <asm/current.h>
> diff --git a/arch/mips/cavium-octeon/crypto/octeon-crypto.c b/arch/mips/cavium-octeon/crypto/octeon-crypto.c
> index 4d22365844af..cfb4a146cf17 100644
> --- a/arch/mips/cavium-octeon/crypto/octeon-crypto.c
> +++ b/arch/mips/cavium-octeon/crypto/octeon-crypto.c
> @@ -9,6 +9,7 @@
>  #include <asm/cop2.h>
>  #include <linux/export.h>
>  #include <linux/interrupt.h>
> +#include <linux/sched/task_stack.h>
>  
>  #include "octeon-crypto.h"
>  
> diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
> index 4b94b7fbafa3..d475c0146347 100644
> --- a/arch/mips/cavium-octeon/smp.c
> +++ b/arch/mips/cavium-octeon/smp.c
> @@ -10,8 +10,8 @@
>  #include <linux/smp.h>
>  #include <linux/interrupt.h>
>  #include <linux/kernel_stat.h>
> -#include <linux/sched.h>
>  #include <linux/sched/hotplug.h>
> +#include <linux/sched/task_stack.h>
>  #include <linux/init.h>
>  #include <linux/export.h>
>  
> diff --git a/arch/mips/kernel/pm.c b/arch/mips/kernel/pm.c
> index dc814892133c..fab05022ab39 100644
> --- a/arch/mips/kernel/pm.c
> +++ b/arch/mips/kernel/pm.c
> @@ -11,6 +11,7 @@
>  
>  #include <linux/cpu_pm.h>
>  #include <linux/init.h>
> +#include <linux/ptrace.h>
>  
>  #include <asm/dsp.h>
>  #include <asm/fpu.h>
> diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
> index e077ea3e11fb..effc1ed18954 100644
> --- a/arch/mips/kernel/smp-mt.c
> +++ b/arch/mips/kernel/smp-mt.c
> @@ -18,7 +18,7 @@
>   * Copyright (C) 2006 Ralf Baechle (ralf@...ux-mips.org)
>   */
>  #include <linux/kernel.h>
> -#include <linux/sched.h>
> +#include <linux/sched/task_stack.h>
>  #include <linux/cpumask.h>
>  #include <linux/interrupt.h>
>  #include <linux/irqchip/mips-gic.h>
> diff --git a/arch/mips/netlogic/common/smp.c b/arch/mips/netlogic/common/smp.c
> index 10d86d54880a..9035558920c1 100644
> --- a/arch/mips/netlogic/common/smp.c
> +++ b/arch/mips/netlogic/common/smp.c
> @@ -37,6 +37,7 @@
>  #include <linux/init.h>
>  #include <linux/smp.h>
>  #include <linux/irq.h>
> +#include <linux/sched/task_stack.h>
>  
>  #include <asm/mmu_context.h>
>  
> diff --git a/arch/mips/netlogic/xlp/cop2-ex.c b/arch/mips/netlogic/xlp/cop2-ex.c
> index 52bc5de42005..d990b7fc84aa 100644
> --- a/arch/mips/netlogic/xlp/cop2-ex.c
> +++ b/arch/mips/netlogic/xlp/cop2-ex.c
> @@ -13,7 +13,8 @@
>  #include <linux/irqflags.h>
>  #include <linux/notifier.h>
>  #include <linux/prefetch.h>
> -#include <linux/sched.h>
> +#include <linux/ptrace.h>
> +#include <linux/sched/task_stack.h>
>  
>  #include <asm/cop2.h>
>  #include <asm/current.h>
> diff --git a/arch/mips/power/cpu.c b/arch/mips/power/cpu.c
> index 2129e67723ff..6ecccc26bf7f 100644
> --- a/arch/mips/power/cpu.c
> +++ b/arch/mips/power/cpu.c
> @@ -7,6 +7,7 @@
>   * Author: Hu Hongbing <huhb@...ote.com>
>   *	   Wu Zhangjin <wuzhangjin@...il.com>
>   */
> +#include <linux/ptrace.h>
>  #include <asm/sections.h>
>  #include <asm/fpu.h>
>  #include <asm/dsp.h>
> -- 
> 2.7.4
> 
> 

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