[PATCH v3 02/18] powerpc: Use generic fallocate compatibility syscall

[Rohan McLure <rmclure@linux.ibm.com>]

The powerpc fallocate compat syscall handler is identical to the
generic implementation provided by commit 59c10c52f573f ("riscv:
compat: syscall: Add compat_sys_call_table implementation"), and as
such can be removed in favour of the generic implementation.

A future patch series will replace more architecture-defined syscall
handlers with generic implementations, dependent on introducing generic
implementations that are compatible with powerpc and arm's parameter
reorderings.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
---
V1 -> V2: Remove arch-specific fallocate handler.
V2 -> V3: Remove generic fallocate prototype. Move to beginning of
series.
---
 arch/powerpc/include/asm/compat.h   | 5 +++++
 arch/powerpc/include/asm/syscalls.h | 2 --
 arch/powerpc/include/asm/unistd.h   | 1 +
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index dda4091fd012..f20caae3f019 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -16,6 +16,11 @@ typedef u16		compat_ipc_pid_t;
 #include <asm-generic/compat.h>
 
 #ifdef __BIG_ENDIAN__
+#define compat_arg_u64(name)		u32  name##_hi, u32  name##_lo
+#define compat_arg_u64_dual(name)	u32, name##_hi, u32, name##_lo
+#define compat_arg_u64_glue(name)	(((u64)name##_lo & 0xffffffffUL) | \
+					 ((u64)name##_hi << 32))
+
 #define COMPAT_UTS_MACHINE	"ppc\0\0"
 #else
 #define COMPAT_UTS_MACHINE	"ppcle\0\0"
diff --git a/arch/powerpc/include/asm/syscalls.h b/arch/powerpc/include/asm/syscalls.h
index 21c2faaa2957..675a8f5ec3ca 100644
--- a/arch/powerpc/include/asm/syscalls.h
+++ b/arch/powerpc/include/asm/syscalls.h
@@ -39,8 +39,6 @@ compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offset1, u32 offset2, u3
 int compat_sys_truncate64(const char __user *path, u32 reg4,
 			  unsigned long len1, unsigned long len2);
 
-long compat_sys_fallocate(int fd, int mode, u32 offset1, u32 offset2, u32 len1, u32 len2);
-
 int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long len1,
 			   unsigned long len2);
 
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index b1129b4ef57d..659a996c75aa 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -45,6 +45,7 @@
 #define __ARCH_WANT_SYS_UTIME
 #define __ARCH_WANT_SYS_NEWFSTATAT
 #define __ARCH_WANT_COMPAT_STAT
+#define __ARCH_WANT_COMPAT_FALLOCATE
 #define __ARCH_WANT_COMPAT_SYS_SENDFILE
 #endif
 #define __ARCH_WANT_SYS_FORK
-- 
2.34.1