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Subject[PATCH v2 07/12] powerpc/32s: Blacklist functions running with MMU disabled for kprobe
Date
kprobe does not handle events happening in real mode, all
functions running with MMU disabled have to be blacklisted.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
---
arch/powerpc/mm/book3s32/hash_low.S | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/mm/book3s32/hash_low.S b/arch/powerpc/mm/book3s32/hash_low.S
index 2afa3fa2012d..f5f836477009 100644
--- a/arch/powerpc/mm/book3s32/hash_low.S
+++ b/arch/powerpc/mm/book3s32/hash_low.S
@@ -163,6 +163,7 @@ _GLOBAL(hash_page)
stw r0, (mmu_hash_lock - PAGE_OFFSET)@l(r8)
blr
#endif /* CONFIG_SMP */
+_ASM_NOKPROBE_SYMBOL(hash_page)

/*
* Add an entry for a particular page to the hash table.
@@ -267,6 +268,7 @@ _GLOBAL(add_hash_page)
lwz r0,4(r1)
mtlr r0
blr
+_ASM_NOKPROBE_SYMBOL(add_hash_page)

/*
* This routine adds a hardware PTE to the hash table.
@@ -472,6 +474,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)

sync /* make sure pte updates get to memory */
blr
+_ASM_NOKPROBE_SYMBOL(create_hpte)

.section .bss
.align 2
@@ -628,6 +631,7 @@ _GLOBAL(flush_hash_pages)
isync
blr
EXPORT_SYMBOL(flush_hash_pages)
+_ASM_NOKPROBE_SYMBOL(flush_hash_pages)

/*
* Flush an entry from the TLB
@@ -665,6 +669,7 @@ _GLOBAL(_tlbie)
sync
#endif /* CONFIG_SMP */
blr
+_ASM_NOKPROBE_SYMBOL(_tlbie)

/*
* Flush the entire TLB. 603/603e only
@@ -706,3 +711,4 @@ _GLOBAL(_tlbia)
isync
#endif /* CONFIG_SMP */
blr
+_ASM_NOKPROBE_SYMBOL(_tlbia)
--
2.25.0
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