riscv: Fix 32-bit RISC-V boot failure
authorBin Meng <bmeng.cn@gmail.com>
Sun, 27 Jun 2021 13:51:17 +0000 (21:51 +0800)
committerPalmer Dabbelt <palmerdabbelt@google.com>
Thu, 22 Jul 2021 05:17:41 +0000 (22:17 -0700)
Commit dd2d082b5760 ("riscv: Cleanup setup_bootmem()") adjusted
the calling sequence in setup_bootmem(), which invalidates the fix
commit de043da0b9e7 ("RISC-V: Fix usage of memblock_enforce_memory_limit")
did for 32-bit RISC-V unfortunately.

So now 32-bit RISC-V does not boot again when testing booting kernel
on QEMU 'virt' with '-m 2G', which was exactly what the original
commit de043da0b9e7 ("RISC-V: Fix usage of memblock_enforce_memory_limit")
tried to fix.

Fixes: dd2d082b5760 ("riscv: Cleanup setup_bootmem()")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
arch/riscv/mm/init.c

index 4faf8bd157eaa986fb6b70238d9c6773e69a164d..0fc72603c699d03e70de7aad48bc1540faa6ccbb 100644 (file)
@@ -123,7 +123,7 @@ void __init setup_bootmem(void)
 {
        phys_addr_t vmlinux_end = __pa_symbol(&_end);
        phys_addr_t vmlinux_start = __pa_symbol(&_start);
-       phys_addr_t dram_end = memblock_end_of_DRAM();
+       phys_addr_t dram_end;
        phys_addr_t max_mapped_addr = __pa(~(ulong)0);
 
 #ifdef CONFIG_XIP_KERNEL
@@ -146,6 +146,8 @@ void __init setup_bootmem(void)
 #endif
        memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);
 
+       dram_end = memblock_end_of_DRAM();
+
        /*
         * memblock allocator is not aware of the fact that last 4K bytes of
         * the addressable memory can not be mapped because of IS_ERR_VALUE