Currently, only X86_64 requires that at least 256M low memory be reserved. X86_32 does not have this requirement. So move all the code related to reserve_crashkernel_low() into macro CONFIG_X86_64. Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> --- arch/x86/kernel/setup.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index acf2f2eedfe3415..d9080bfa131a654 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -392,9 +392,9 @@ static void __init memblock_x86_reserve_range_setup_data(void) #ifdef CONFIG_KEXEC_CORE +#ifdef CONFIG_X86_64 static int __init reserve_crashkernel_low(void) { -#ifdef CONFIG_X86_64 unsigned long long base, low_base = 0, low_size = 0; unsigned long low_mem_limit; int ret; @@ -434,9 +434,10 @@ static int __init reserve_crashkernel_low(void) crashk_low_res.start = low_base; crashk_low_res.end = low_base + low_size - 1; -#endif + return 0; } +#endif static void __init reserve_crashkernel(void) { @@ -490,10 +491,12 @@ static void __init reserve_crashkernel(void) } } +#ifdef CONFIG_X86_64 if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) { memblock_phys_free(crash_base, crash_size); return; } +#endif pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n", (unsigned long)(crash_size >> 20), -- 2.25.1 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec