linux-kernel - [PATCH 5.10 594/717] RISC-V: Fix usage of memblock_enforce_memory

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Date:   Mon, 28 Dec 2020 13:49:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bin Meng <bin.meng@...driver.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Atish Patra <atish.patra@....com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: [PATCH 5.10 594/717] RISC-V: Fix usage of memblock_enforce_memory_limit

From: Atish Patra <atish.patra@....com>

commit de043da0b9e71147ca610ed542d34858aadfc61c upstream.

memblock_enforce_memory_limit accepts the maximum memory size not the
maximum address that can be handled by kernel. Fix the function invocation
accordingly.

Fixes: 1bd14a66ee52 ("RISC-V: Remove any memblock representing unusable memory area")
Cc: stable@...r.kernel.org
Reported-by: Bin Meng <bin.meng@...driver.com>
Tested-by: Bin Meng <bin.meng@...driver.com>
Acked-by: Mike Rapoport <rppt@...ux.ibm.com>
Signed-off-by: Atish Patra <atish.patra@....com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/riscv/mm/init.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -174,7 +174,7 @@ void __init setup_bootmem(void)
 	 * Make sure that any memory beyond mem_start + (-PAGE_OFFSET) is removed
 	 * as it is unusable by kernel.
 	 */
-	memblock_enforce_memory_limit(mem_start - PAGE_OFFSET);
+	memblock_enforce_memory_limit(-PAGE_OFFSET);
 
 	/* Reserve from the start of the kernel to the end of the kernel */
 	memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);