[PATCH] riscv: compat: make __ARCH_WANT_COMPAT_FADVISE64_64 conditional

[Randy Dunlap]

When CONFIG_ADVISE_SYSCALLS is not set/enabled and CONFIG_COMPAT is
set/enabled, the riscv compat_syscall_table references
'compat_sys_fadvise64_64', which is not defined:

riscv64-linux-ld: arch/riscv/kernel/compat_syscall_table.o:(.rodata+0x6f8):
undefined reference to `compat_sys_fadvise64_64'

Only set __ARCH_WANT_COMPAT_FADVISE64_64 when CONFIG_ADVISE_SYSCALLS
is set.

Fixes: 59c10c52f573 ("riscv: compat: syscall: Add compat_sys_call_table implementation")
Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
Cc: Paul Walmsley <paul.walmsley at sifive.com>
Cc: Palmer Dabbelt <palmer at dabbelt.com>
Cc: Albert Ou <aou at eecs.berkeley.edu>
Cc: linux-riscv at lists.infradead.org
Cc: Guo Ren <guoren at kernel.org>
Cc: Arnd Bergmann <arnd at arndb.de>
---
 arch/riscv/include/asm/unistd.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/riscv/include/asm/unistd.h
+++ b/arch/riscv/include/asm/unistd.h
@@ -18,8 +18,10 @@
 #define __ARCH_WANT_COMPAT_PWRITE64
 #define __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
 #define __ARCH_WANT_COMPAT_READAHEAD
+#ifdef CONFIG_ADVISE_SYSCALLS
 #define __ARCH_WANT_COMPAT_FADVISE64_64
 #endif
+#endif
 
 #include <uapi/asm/unistd.h>