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csky: fix csky_cmpxchg_fixup not working

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[ Upstream commit 809ef03d6d21d5fea016bbf6babeec462e37e68c ]

In the csky_cmpxchg_fixup function, it is incorrect to use the global
variable csky_cmpxchg_stw to determine the address where the exception
occurred.The global variable csky_cmpxchg_stw stores the opcode at the
time of the exception, while &csky_cmpxchg_stw shows the address where
the exception occurred.

Signed-off-by: Yang Li <yang.li85200@gmail.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Li 2024-10-16 17:56:26 +08:00 committed by Greg Kroah-Hartman
parent c88717b107
commit 8ad9e930fb
1 changed files with 2 additions and 2 deletions
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4
arch/csky/mm/fault.c
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@ -45,8 +45,8 @@ static inline void csky_cmpxchg_fixup(struct pt_regs *regs)
if (trap_no(regs) != VEC_TLBMODIFIED)
return;
if (instruction_pointer(regs) == csky_cmpxchg_stw)
instruction_pointer_set(regs, csky_cmpxchg_ldw);
if (instruction_pointer(regs) == (unsigned long)&csky_cmpxchg_stw)
instruction_pointer_set(regs, (unsigned long)&csky_cmpxchg_ldw);
return;
}
#endif