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| author |   Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-07-15 17:23:13 +0100 |
|---|---|---|
| committer |   Mark Rutland <mark.rutland@arm.com> | 2017-08-15 18:35:47 +0100 |
| commit | 8ea41b11ef746e1ac97f8c90911e5c61f8bd5cc0 (patch) | |
| tree | 68ad3c4487ce3ae68ae2b4b6f32519ca60ccf19c /arch/arm64/include/asm/stacktrace.h | |
| parent | arm64: factor out entry stack manipulation (diff) | |
| download | linux-dev-8ea41b11ef746e1ac97f8c90911e5c61f8bd5cc0.tar.xz linux-dev-8ea41b11ef746e1ac97f8c90911e5c61f8bd5cc0.zip | |
arm64: assembler: allow adr_this_cpu to use the stack pointer
Given that adr_this_cpu already requires a temp register in addition
to the destination register, tweak the instruction sequence so that sp
may be used as well.
This will simplify switching to per-cpu stacks in subsequent patches. While
this limits the range of adr_this_cpu, to +/-4GiB, we don't currently use
adr_this_cpu in modules, and this is not problematic for the main kernel image.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[Mark: add more commit text]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions