Changeset 819a768 in mainline for kernel/arch/sparc64/include/asm.h

Timestamp:

2010-05-21T22:34:33Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

0242621

Parents:

2ee907e

Message:

On sparc64, we have a problem with determining the end of the kernel stack
because the preemptible trap handler cannot easily terminate the stack trace by
writing -STACK_BIAS to %fp as that %fp is unfortunatelly an %sp of the previous
context (user or kernel).

Without sacrifying performance via the FLUSHW instruction, we simply have to
stop tracing when we see the stack frame with %sp created by the SAVE
instruction inside the preemptible trap handler.

(No files)