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Subject[PATCH v2 3/3] riscv: Support BUG() in kernel module
Date
The kernel module is loaded into vmalloc region which is located below
to the PAGE_OFFSET. Hence the condition, pc < PAGE_OFFSET, in the
is_valid_bugaddr() will filter out all trap exceptions triggered
by kernel module. To support BUG() in kernel module, the condition is
changed to pc < VMALLOC_START.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
---
arch/riscv/kernel/traps.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 0cd0137..9551388 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -156,7 +156,7 @@ int is_valid_bugaddr(unsigned long pc)
{
bug_insn_t insn;

- if (pc < PAGE_OFFSET)
+ if (pc < VMALLOC_START)
return 0;
if (probe_kernel_address((bug_insn_t *)pc, insn))
return 0;
--
1.7.1
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