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| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2021-07-23 18:16:00 +0200 |
|---|---|---|
| committer | Guo Ren <guoren@linux.alibaba.com> | 2022-11-11 10:59:28 +0100 |
| commit | 7e2004906fb52257772be0ef262fba2d5eb1653b (patch) | |
| tree | f6137054d2a7757f656e8fbc43e92d7dea26d81a /arch/csky/kernel/entry.S | |
| parent | Revert "csky: Fixup CONFIG_DEBUG_RSEQ" (diff) | |
| download | linux-7e2004906fb52257772be0ef262fba2d5eb1653b.tar.xz linux-7e2004906fb52257772be0ef262fba2d5eb1653b.zip | |
Revert "csky: Add support for restartable sequence"
This reverts commit 9866d141a0977ace974400bf1f793dfc163409ce.
The csky rseq support has been merged without ever notifying the rseq
maintainers, and without any of the required asssembler glue in the rseq
selftests, which means it is entirely untested.
It is also derived from a non-upstream riscv patch which has known bugs.
The assembly part of this revert should be carefully reviewed by the
architecture maintainer because it touches code which has changed since
the merge of the reverted patch.
The rseq selftests assembly glue should be introduced at the same time
as the architecture rseq support. Without the presence of any test, I
recommend reverting rseq support from csky for now.
Link: https://lore.kernel.org/lkml/1257037909.25426.1626705790861.JavaMail.zimbra@efficios.com/
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-csky@vger.kernel.org
Diffstat (limited to 'arch/csky/kernel/entry.S')
| -rw-r--r-- | arch/csky/kernel/entry.S | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S index a4b519fbb371..c68cdcc76d60 100644 --- a/arch/csky/kernel/entry.S +++ b/arch/csky/kernel/entry.S @@ -50,10 +50,6 @@ ENTRY(csky_systemcall) SAVE_ALL TRAP0_SIZE zero_fp context_tracking -#ifdef CONFIG_RSEQ_DEBUG - mov a0, sp - jbsr rseq_syscall -#endif psrset ee, ie lrw r9, __NR_syscalls |