Re: [PATCH v1 12/13] tools headers: Sync compiler.h headers

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On 10/03/2024 02:05, Ian Rogers wrote:
> compiler.h - synced from include/linux/compiler.h, guards were
>  added to definitions to avoid redefinition of macros
>  in libc. ftrace, CONFIG_OBJTOOL and kentry logic was removed as
>  redundant.
> 

Hi Ian,

This commit breaks the Arm build (and cross compilation for Arm on x86):

  $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

Something like this, but I won't paste the whole output because it's huge:

tools/include/linux/ring_buffer.h: In function ‘ring_buffer_read_head’:

tools/include/asm/../../arch/arm64/include/asm/barrier.h:72:35: error:
‘__u8_alias_t’ undeclared (first use in this function)
   72 |                         : "=r" (*(__u8_alias_t *)__u.__c)
       \
      |                                   ^~~~~~~~~~~~
tools/include/linux/ring_buffer.h:59:16: note: in expansion of macro
‘smp_load_acquire’
   59 |         return smp_load_acquire(&base->data_head);
      |                ^~~~~~~~~~~~~~~~

Thanks
James




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