avr32: wire up copy_file_range syscall
This patch wires up the new copy_file_range syscall on AVR32.
On AVR32, all parameters beyond the 5th are passed on the stack. System
calls don't use the stack -- they borrow a callee-saved register
instead. This means that syscalls that take 6 parameters must be called
through a stub that pushes the last parameter on the stack.
Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
diff --git a/arch/avr32/include/uapi/asm/unistd.h b/arch/avr32/include/uapi/asm/unistd.h
index b60132b..60c0f3a 100644
--- a/arch/avr32/include/uapi/asm/unistd.h
+++ b/arch/avr32/include/uapi/asm/unistd.h
@@ -337,5 +337,6 @@
#define __NR_userfaultfd 322
#define __NR_membarrier 323
#define __NR_mlock2 324
+#define __NR_copy_file_range 325
#endif /* _UAPI__ASM_AVR32_UNISTD_H */
diff --git a/arch/avr32/kernel/syscall-stubs.S b/arch/avr32/kernel/syscall-stubs.S
index f9c68fa..cb39915 100644
--- a/arch/avr32/kernel/syscall-stubs.S
+++ b/arch/avr32/kernel/syscall-stubs.S
@@ -124,3 +124,12 @@
call sys_process_vm_writev
sub sp, -4
popm pc
+
+ .global __sys_copy_file_range
+ .type __sys_copy_file_range,@function
+__sys_copy_file_range:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_copy_file_range
+ sub sp, -4
+ popm pc
diff --git a/arch/avr32/kernel/syscall_table.S b/arch/avr32/kernel/syscall_table.S
index 1915a443..64d71a7 100644
--- a/arch/avr32/kernel/syscall_table.S
+++ b/arch/avr32/kernel/syscall_table.S
@@ -338,4 +338,5 @@
.long sys_userfaultfd
.long sys_membarrier
.long sys_mlock2
+ .long __sys_copy_file_range /* 325 */
.long sys_ni_syscall /* r8 is saturated at nr_syscalls */