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| author | Mark Rutland <mark.rutland@arm.com> | 2016-11-03 20:23:12 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-11-11 18:25:45 +0000 |
| commit | 1b7e2296a822dfd2349960addc42a139360ce769 (patch) | |
| tree | caf118cceca10b7a7ecc3ab7b3019f52d1d409ed /arch/arm64/kernel | |
| parent | 57c82954e77fa12c1023e87210d2ede77aaa0058 (diff) | |
| download | talos-op-linux-1b7e2296a822dfd2349960addc42a139360ce769.tar.gz talos-op-linux-1b7e2296a822dfd2349960addc42a139360ce769.zip | |
arm64: assembler: introduce ldr_this_cpu
Shortly we will want to load a percpu variable in the return from
userspace path. We can save an instruction by folding the addition of
the percpu offset into the load instruction, and this patch adds a new
helper to do so.
At the same time, we clean up this_cpu_ptr for consistency. As with
{adr,ldr,str}_l, we change the template to take the destination register
first, and name this dst. Secondly, we rename the macro to adr_this_cpu,
following the scheme of adr_l, and matching the newly added
ldr_this_cpu.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 223d54a4d66b..2d4c83bc1f81 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -200,7 +200,7 @@ alternative_else_nop_endif cmp x25, tsk b.ne 9998f - this_cpu_ptr irq_stack, x25, x26 + adr_this_cpu x25, irq_stack, x26 mov x26, #IRQ_STACK_START_SP add x26, x25, x26 |
