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LoongArch: Use correct accessor to read FWPC/MWPC 

CSR.FWPC and CSR.MWPC are 32bit registers, so use csr_read32() rather
than csr_read64() to read the values of FWPC/MWPC.

Cc: stable@vger.kernel.org
Fixes: edffa33c7b ("LoongArch: Add hardware breakpoints/watchpoints support")
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Huacai Chen 2025-11-09 16:02:01 +08:00
parent 4c8a7c9827
commit eeeeaafa62
1 changed files with 2 additions and 2 deletions
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4
arch/loongarch/include/asm/hw_breakpoint.h
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@ -134,13 +134,13 @@ static inline void hw_breakpoint_thread_switch(struct task_struct *next)
/* Determine number of BRP registers available. */
static inline int get_num_brps(void)
{
return csr_read64(LOONGARCH_CSR_FWPC) & CSR_FWPC_NUM;
return csr_read32(LOONGARCH_CSR_FWPC) & CSR_FWPC_NUM;
}
/* Determine number of WRP registers available. */
static inline int get_num_wrps(void)
{
return csr_read64(LOONGARCH_CSR_MWPC) & CSR_MWPC_NUM;
return csr_read32(LOONGARCH_CSR_MWPC) & CSR_MWPC_NUM;
}
#endif /* __KERNEL__ */