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-rw-r--r--arch/powerpc/kernel/misc_32.S5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index fe4bd321730e..02d90e1ebf65 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -452,7 +452,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
stwu r9,16(r3)
_GLOBAL(copy_page)
+ rlwinm r5, r3, 0, L1_CACHE_BYTES - 1
addi r3,r3,-4
+
+0: twnei r5, 0 /* WARN if r3 is not cache aligned */
+ EMIT_BUG_ENTRY 0b,__FILE__,__LINE__, BUGFLAG_WARNING
+
addi r4,r4,-4
li r5,4