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e7325ec02a
The read_csr macro returns the CSR value as a `unsigned long`. However,
the format specifier presently treats it as a `uint32_t`. This causes
a -Wformat error to be emitted by Clang 18:
cpu/riscv_common/irq_arch.c:149:49: error: format specifies type 'unsigned int'
but the argument has type 'unsigned long' [-Werror,-Wformat]
149 | printf(" mepc: 0x%" PRIx32 "\n", read_csr(mepc));