diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 15:50:21 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 05:22:05 +0300 |
| commit | 5747230645562921b5bc19f6409f7af08fe17c6d (patch) | |
| tree | 159d06a6af15fb4d91d917648b9f2904607a982e /arch/powerpc/lib/sstep.c | |
| parent | e464d92b292cc61f8f0791cf87d3646204bbb208 (diff) | |
| download | linux-5747230645562921b5bc19f6409f7af08fe17c6d.tar.xz | |
powerpc/32: Remove ksp_limit
ksp_limit is there to help detect stack overflows.
That is specific to ppc32 as it was removed from ppc64 in
commit cbc9565ee826 ("powerpc: Remove ksp_limit on ppc64").
There are other means for detecting stack overflows.
As ppc64 has proven to not need it, ppc32 should be able to do
without it too.
Lets remove it and simplify exception handling.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/d789c3385b22e07bedc997613c0d26074cb513e7.1615552866.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/lib/sstep.c')
| -rw-r--r-- | arch/powerpc/lib/sstep.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index c6aebc149d14..739ea6dc461c 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -3086,15 +3086,6 @@ NOKPROBE_SYMBOL(analyse_instr); */ static nokprobe_inline int handle_stack_update(unsigned long ea, struct pt_regs *regs) { -#ifdef CONFIG_PPC32 - /* - * Check if we will touch kernel stack overflow - */ - if (ea - STACK_INT_FRAME_SIZE <= current->thread.ksp_limit) { - printk(KERN_CRIT "Can't kprobe this since kernel stack would overflow.\n"); - return -EINVAL; - } -#endif /* CONFIG_PPC32 */ /* * Check if we already set since that means we'll * lose the previous value. |