[PATCH] powerpc/shared: include correct header for static key

[PATCH] powerpc/shared: include correct header for static key

[Jason A. Donenfeld]

Recently, the spinlock implementation grew a static key optimization,
but the jump_label.h header include was left out, leading to build
errors:

linux/arch/powerpc/include/asm/spinlock.h:44:7: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
   44 |  if (!static_branch_unlikely(&shared_processor))

This commit adds the missing header.

Fixes: 656c21d6af5d ("powerpc/shared: Use static key to detect shared processor")
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 arch/powerpc/include/asm/spinlock.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 1b55fc08f853..860228e917dc 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -15,6 +15,7 @@
  *
  * (the type definitions are in asm/spinlock_types.h)
  */
+#include <linux/jump_label.h>
 #include <linux/irqflags.h>
 #ifdef CONFIG_PPC64
 #include <asm/paca.h>
-- 
2.24.1

Re: [PATCH] powerpc/shared: include correct header for static key

[Michael Ellerman]

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On Mon, 2019-12-23 at 13:31:47 UTC, "Jason A. Donenfeld" wrote:
> Recently, the spinlock implementation grew a static key optimization,
> but the jump_label.h header include was left out, leading to build
> errors:
> 
> linux/arch/powerpc/include/asm/spinlock.h:44:7: error: implicit declaration of function ‘static_branch_unlikely’ [-Werror=implicit-function-declaration]
>    44 |  if (!static_branch_unlikely(&shared_processor))
> 
> This commit adds the missing header.
> 
> Fixes: 656c21d6af5d ("powerpc/shared: Use static key to detect shared processor")
> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/6da3eced8c5f3b03340b0c395bacd552c4d52411

cheers

Re: [PATCH] powerpc/shared: include correct header for static key

[Srikar Dronamraju]

* Jason A. Donenfeld <Jason@zx2c4.com> [2019-12-23 14:31:47]:

> Recently, the spinlock implementation grew a static key optimization,
> but the jump_label.h header include was left out, leading to build
> errors:
> 
> linux/arch/powerpc/include/asm/spinlock.h:44:7: error: implicit declaration of function ???static_branch_unlikely??? [-Werror=implicit-function-declaration]
>    44 |  if (!static_branch_unlikely(&shared_processor))
> 
> This commit adds the missing header.

Right, This was in v4 version of the patchset
(http://lkml.kernel.org/r/20191212085344.17357-1-srikar@linux.vnet.ibm.com)
but we missed it in the final v5 version.

Thanks for noticing and fixing it.

Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>

> 
> Fixes: 656c21d6af5d ("powerpc/shared: Use static key to detect shared processor")
> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
> ---
>  arch/powerpc/include/asm/spinlock.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
> index 1b55fc08f853..860228e917dc 100644
> --- a/arch/powerpc/include/asm/spinlock.h
> +++ b/arch/powerpc/include/asm/spinlock.h
> @@ -15,6 +15,7 @@
>   *
>   * (the type definitions are in asm/spinlock_types.h)
>   */
> +#include <linux/jump_label.h>
>  #include <linux/irqflags.h>
>  #ifdef CONFIG_PPC64
>  #include <asm/paca.h>
> -- 
> 2.24.1
> 

-- 
Thanks and Regards
Srikar Dronamraju