Build failure in -next: Building arc:vdk_hs38_smp_defconfig ... failed

[Guenter Roeck]

Seen since next-20151105.

Building arc:vdk_hs38_smp_defconfig ... failed
--------------
Error log:
In file included from ./arch/arc/include/asm/irqflags-arcv2.h:12:0,
                 from ./arch/arc/include/asm/irqflags.h:16,
                 from include/linux/irqflags.h:15,
                 from include/linux/spinlock.h:53,
                 from include/linux/rcupdate.h:38,
                 from include/linux/idr.h:18,
                 from include/linux/kernfs.h:14,
                 from include/linux/sysfs.h:15,
                 from include/linux/kobject.h:21,
                 from include/linux/device.h:17,
                 from include/linux/of_platform.h:14,
                 from arch/arc/plat-axs10x/axs10x.c:17:
arch/arc/plat-axs10x/axs10x.c: In function âaxs103_early_initâ:
arch/arc/plat-axs10x/axs10x.c:401:41: error: âARC_REG_MCIP_BCRâ undeclared (first use in this function)
  unsigned int num_cores = (read_aux_reg(ARC_REG_MCIP_BCR) >> 16) & 0x3F;
                                         ^
./arch/arc/include/asm/arcregs.h:119:44: note: in definition of macro âread_aux_regâ
 #define read_aux_reg(reg) __builtin_arc_lr(reg)
                                            ^
arch/arc/plat-axs10x/axs10x.c:401:41: note: each undeclared identifier is reported only once for each function it appears in
  unsigned int num_cores = (read_aux_reg(ARC_REG_MCIP_BCR) >> 16) & 0x3F;
                                         ^
./arch/arc/include/asm/arcregs.h:119:44: note: in definition of macro âread_aux_regâ
 #define read_aux_reg(reg) __builtin_arc_lr(reg)

Seems to be caused by commit f78442cc68a1 ("ARC: remove extraneous header include")
which afaics removes the include file providing the missing define.

Guenter
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