Re: [U-Boot] [PATCH 3/3 v2] Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value

Dear Alessandro Rubini,

In message 20101026205756.GA2139@morgana.i.gnudd.com you wrote:

Instead of:

 DEFINE(GENERATED_GBL_DATA_SIZE,
         (sizeof(struct global_data)+15) & ~15);

I'd use:

 DEFINE(GENERATED_GBL_DATA_SIZE,
         (sizeof(struct global_data)),

leaving the alignment requirement in the structure itself (include/asm/global_data.h for each architecture).

Is it guaranteed (I mean by the C standard) that the alignment of a struct (which affects only the possible start address) also has effect on the sizeof() for that struct, in the sense that sizeof() is guaranteed to be a multiple of that alignment requirement?

Best regards,

Wolfgang Denk