suse man page for arch_has_block_step

ARCH_HAS_BLOCK_STEP(9)						 Kernel Internals					    ARCH_HAS_BLOCK_STEP(9)

NAME
       arch_has_block_step - does this CPU support user-mode block-step?

SYNOPSIS
       arch_has_block_step(void);

ARGUMENTS
       None

DESCRIPTION
       If this is defined, then there must be a function declaration or inline for user_enable_block_step, and arch_has_single_step must be
       defined too.  arch_has_block_step should evaluate to nonzero iff the machine supports step-until-branch for user mode. It can be a constant
       or it can test a CPU feature bit.

Kernel Hackers Manual 2.6.					     July 2010						    ARCH_HAS_BLOCK_STEP(9)