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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-30 12:39:05 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-05-03 01:20:28 +1000 |
| commit | d1865e71cdc9b75b6a6716a2983eb5d6004cfca9 (patch) | |
| tree | b56eef5869bae0012b62383694e17007ce8c804c /arch/powerpc/kernel/setup-common.c | |
| parent | powerpc/32: don't do syscall stuff in transfer_to_handler (diff) | |
| download | wireguard-linux-d1865e71cdc9b75b6a6716a2983eb5d6004cfca9.tar.xz wireguard-linux-d1865e71cdc9b75b6a6716a2983eb5d6004cfca9.zip | |
powerpc/32: Don't add dummy frames when calling trace_hardirqs_on/off
No need to add dummy frames when calling trace_hardirqs_on or
trace_hardirqs_off. GCC properly handles empty stacks.
In addition, powerpc doesn't set CONFIG_FRAME_POINTER, therefore
__builtin_return_address(1..) returns NULL at all time. So the
dummy frames are definitely unneeded here.
In the meantime, avoid reading memory for loading r1 with a value
we already know.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions