These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / tile / include / asm / syscall.h

diff --git a/kernel/arch/tile/include/asm/syscall.h b/kernel/arch/tile/include/asm/syscall.h
index 9644b88..373d730 100644 (file)
--- a/kernel/arch/tile/include/asm/syscall.h
+++ b/kernel/arch/tile/include/asm/syscall.h
@@ -20,6 +20,8 @@
 
 #include <linux/sched.h>
 #include <linux/err.h>
+#include <linux/audit.h>
+#include <linux/compat.h>
 #include <arch/abi.h>
 
 /* The array of function pointers for syscalls. */
@@ -61,7 +63,15 @@ static inline void syscall_set_return_value(struct task_struct *task,
                                            struct pt_regs *regs,
                                            int error, long val)
 {
-       regs->regs[0] = (long) error ?: val;
+       if (error) {
+               /* R0 is the passed-in negative error, R1 is positive. */
+               regs->regs[0] = error;
+               regs->regs[1] = -error;
+       } else {
+               /* R1 set to zero to indicate no error. */
+               regs->regs[0] = val;
+               regs->regs[1] = 0;
+       }
 }
 
 static inline void syscall_get_arguments(struct task_struct *task,
@@ -82,4 +92,20 @@ static inline void syscall_set_arguments(struct task_struct *task,
        memcpy(&regs[i], args, n * sizeof(args[0]));
 }
 
+/*
+ * We don't care about endianness (__AUDIT_ARCH_LE bit) here because
+ * tile has the same system calls both on little- and big- endian.
+ */
+static inline int syscall_get_arch(void)
+{
+       if (is_compat_task())
+               return AUDIT_ARCH_TILEGX32;
+
+#ifdef CONFIG_TILEGX
+       return AUDIT_ARCH_TILEGX;
+#else
+       return AUDIT_ARCH_TILEPRO;
+#endif
+}
+
 #endif /* _ASM_TILE_SYSCALL_H */