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| author |   Nicholas Piggin <npiggin@gmail.com> | 2022-09-26 13:40:53 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 19:22:12 +1000 |
| commit | 17773afdcd1589c5925a984f512330410cb2ba4f (patch) | |
| tree | 0f209601034524b3258a4280e1b293c4581218da /arch/powerpc/kernel/trace | |
| parent | powerpc/64s: POWER10 CPU Kconfig build option (diff) | |
| download | linux-dev-17773afdcd1589c5925a984f512330410cb2ba4f.tar.xz linux-dev-17773afdcd1589c5925a984f512330410cb2ba4f.zip | |
powerpc/64: use 32-bit immediate for STACK_FRAME_REGS_MARKER
Using a 32-bit constant for this marker allows it to be loaded with
two ALU instructions, like 32-bit. This avoids a TOC entry and a
TOC load that depends on the r2 value that has just been loaded from
the PACA.
This changes the value for 32-bit as well, so both have the same
value in the low 4 bytes and 64-bit has 0 in the top bytes.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220926034057.2360083-2-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/trace')
0 files changed, 0 insertions, 0 deletions