RISC-V: Export some expected symbols for modules

These are the ones needed by current allmodconfig, so add them instead
of everything other architectures are exporting -- the rest can be
added on demand later if needed.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPalmer Dabbelt <palmer@sifive.com>

arch/riscv/kernel/riscv_ksyms.c

@@ -12,4 +12,7 @@
 /*
  * Assembly functions that may be used (directly or indirectly) by modules
  */
+EXPORT_SYMBOL(__clear_user);
 EXPORT_SYMBOL(__copy_user);
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcpy);

arch/riscv/kernel/setup.c

@@ -58,7 +58,9 @@ static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
 #endif /* CONFIG_CMDLINE_BOOL */
 
 unsigned long va_pa_offset;
+EXPORT_SYMBOL(va_pa_offset);
 unsigned long pfn_base;
+EXPORT_SYMBOL(pfn_base);
 
 unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss;
 EXPORT_SYMBOL(empty_zero_page);

arch/riscv/lib/delay.c

@@ -84,6 +84,7 @@ void __delay(unsigned long cycles)
 	while ((unsigned long)(get_cycles() - t0) < cycles)
 		cpu_relax();
 }
+EXPORT_SYMBOL(__delay);
 
 void udelay(unsigned long usecs)
 {