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The ARM allmodconfig build currently warngs because of the
ux500 crypto driver not working well with the jump label
implementation that we started using for dynamic debug, which
breaks building with 'gcc -O0':

In file included from /git/arm-soc/include/linux/jump_label.h:105:0,
                 from /git/arm-soc/include/linux/dynamic_debug.h:5,
                 from /git/arm-soc/include/linux/printk.h:289,
                 from /git/arm-soc/include/linux/kernel.h:13,
                 from /git/arm-soc/include/linux/clk.h:16,
                 from /git/arm-soc/drivers/crypto/ux500/hash/hash_core.c:16:
/git/arm-soc/arch/arm/include/asm/jump_label.h: In function 'hash_set_dma_transfer':
/git/arm-soc/arch/arm/include/asm/jump_label.h:13:7: error: asm operand 0 probably doesn't match constraints [-Werror]
  asm_volatile_goto("1:\n\t"

Turning off compiler optimizations has never really been supported
here, and it's only used when debugging the driver. I have not found
a g...