arm64: gpr-num: add __GPR_NUM() helper

The gpr-num infrastructure requires users to concatenate the register
name with a long prefix in order to get a symbol that evaluates to a
compile-time constant. Doing this manually is error-prone and painful to
read.

Add a new __GPR_NUM() helper which wraps the concatenation.

For the moment I've left existing open-coded concatenation as-is. In
particular, the DEFINE_MRS_S() and DEFINE_MSR_S() macros have awkward
stringification requirements and would require invasive changes that
outweigh the benefit. I have plans to rework those in the near future to
remove the need to use gpr-num values.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Cc: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Jinjie Ruan <ruanjinjie@huawei.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <yang@os.amperecomputing.com>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

0 files changed, 0 insertions, 0 deletions