FROMLIST: riscv: mmap(): use unsigned offset type in riscv_sys_mmap

The variable type of offset should be consistent with the relevant
interfaces of mmap which described in commit 295f100 ("syscalls:
mmap(): use unsigned offset type consistently). Otherwise, a user input
with the top bit set would result in a negative page offset rather than a
large one.

Signed-off-by: Jessica Liu <[email protected]>
Reviewed-by: Alexandre Ghiti <[email protected]>
Reviewed-by: Nutty Liu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Han Gao <[email protected]>

Author: Jessica Liu

arch/riscv/kernel/sys_riscv.c

@@ -10,7 +10,7 @@
 
 static long riscv_sys_mmap(unsigned long addr, unsigned long len,
 			   unsigned long prot, unsigned long flags,
-			   unsigned long fd, off_t offset,
+			   unsigned long fd, unsigned long offset,
 			   unsigned long page_shift_offset)
 {
 	if (unlikely(offset & (~PAGE_MASK >> page_shift_offset)))