Unverified Commit fdf3a7a1 authored Jul 26, 2021 by Alexandre Ghiti Committed by Palmer Dabbelt Aug 12, 2021

riscv: Fix comment regarding kernel mapping overlapping with IS_ERR_VALUE



The current comment states that we check if the 64-bit kernel mapping
overlaps with the last 4K of the address space that is reserved to
error values in create_kernel_page_table, which is not the case since it
is done in setup_vm. But anyway, remove the reference to any function
and simply note that in 64-bit kernel, the check should be done as soon
as the kernel mapping base address is known.

Fixes: db6b84a3 ("riscv: Make sure the kernel mapping does not overlap with IS_ERR_VALUE")
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

parent 030d6dbf

arch/riscv/mm/init.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -197,7 +197,7 @@ static void __init setup_bootmem(void)
		* if end of dram is equal to maximum addressable memory. For 64-bit
		* kernel, this problem can't happen here as the end of the virtual
		* address space is occupied by the kernel mapping then this check must
		* be done in create_kernel_page_table.
		* be done as soon as the kernel mapping base address is determined.
		*/
		max_mapped_addr = __pa(~(ulong)0);
		if (max_mapped_addr == (phys_ram_end - 1))