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riscv: mm: fix truncation warning on RV32
[ Upstream commitb690e266da
] lkp reports below sparse warning when building for RV32: arch/riscv/mm/init.c:1204:48: sparse: warning: cast truncates bits from constant value (100000000 becomes 0) IMO, the reason we didn't see this truncates bug in real world is "0" means MEMBLOCK_ALLOC_ACCESSIBLE in memblock and there's no RV32 HW with more than 4GB memory. Fix it anyway to make sparse happy. Fixes:decf89f86e
("riscv: try to allocate crashkern region from 32bit addressible memory") Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202306080034.SLiCiOMn-lkp@intel.com/ Link: https://lore.kernel.org/r/20230709171036.1906-1-jszhang@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -843,7 +843,7 @@ static void __init reserve_crashkernel(void)
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*/
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crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
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search_start,
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min(search_end, (unsigned long) SZ_4G));
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min(search_end, (unsigned long)(SZ_4G - 1)));
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if (crash_base == 0) {
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/* Try again without restricting region to 32bit addressible memory */
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crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
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