[PATCH v2 03/14] powerpc: Remove direct call to mmap2 syscall handlers

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

Syscall handlers should not be invoked internally by their symbol names,
as these symbols defined by the architecture-defined SYSCALL_DEFINE
macro. Move the compatibility syscall definition for mmap2 to
syscalls.c, so that all mmap implementations can share an inline helper
function, as is done with the personality handlers.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
---
V1 -> V2: Move mmap2 compat implementation to asm/kernel/syscalls.c.
---
 arch/powerpc/kernel/sys_ppc32.c                    | 10 ----------
 arch/powerpc/kernel/syscalls.c                     | 11 +++++++++++
 arch/powerpc/kernel/syscalls/syscall.tbl           |  2 +-
 tools/perf/arch/powerpc/entry/syscalls/syscall.tbl |  4 ++--
 4 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index c3490adcb158..89e8c478fd6a 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -25,7 +25,6 @@
 #include <linux/poll.h>
 #include <linux/personality.h>
 #include <linux/stat.h>
-#include <linux/mman.h>
 #include <linux/in.h>
 #include <linux/syscalls.h>
 #include <linux/unistd.h>
@@ -48,15 +47,6 @@
 #include <asm/syscalls.h>
 #include <asm/switch_to.h>
 
-COMPAT_SYSCALL_DEFINE6(mmap2,
-		       unsigned long, addr, size_t, len,
-		       unsigned long, prot, unsigned long, flags,
-		       unsigned long, fd, unsigned long, pgoff)
-{
-	/* This should remain 12 even if PAGE_SIZE changes */
-	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
-}
-
 /* 
  * long long munging:
  * The 32 bit ABI passes long longs in an odd even register pair.
diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c
index 22755502afc0..9f339bcb433d 100644
--- a/arch/powerpc/kernel/syscalls.c
+++ b/arch/powerpc/kernel/syscalls.c
@@ -56,6 +56,17 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, size_t, len,
 	return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
 }
 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE6(mmap2,
+		       unsigned long, addr, size_t, len,
+		       unsigned long, prot, unsigned long, flags,
+		       unsigned long, fd, unsigned long, pgoff)
+{
+	/* This should remain 12 even if PAGE_SIZE changes */
+	return do_mmap2(addr, len, prot, flags, fd, pgoff << 12, PAGE_SHIFT-12);
+}
+#endif
+
 SYSCALL_DEFINE6(mmap, unsigned long, addr, size_t, len,
 		unsigned long, prot, unsigned long, flags,
 		unsigned long, fd, off_t, offset)
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 54bb5834785f..59d9259dfbb5 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -243,7 +243,7 @@
 189	nospu	vfork				sys_vfork
 190	common	ugetrlimit			sys_getrlimit			compat_sys_getrlimit
 191	common	readahead			sys_readahead			compat_sys_ppc_readahead
-192	32	mmap2				sys_mmap2			compat_sys_ppc_mmap2
+192	32	mmap2				sys_mmap2			compat_sys_mmap2
 193	32	truncate64			sys_truncate64			compat_sys_ppc_truncate64
 194	32	ftruncate64			sys_ftruncate64			compat_sys_ppc_ftruncate64
 195	32	stat64				sys_stat64
diff --git a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
index 54bb5834785f..437066f5c4b2 100644
--- a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
+++ b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
@@ -243,7 +243,7 @@
 189	nospu	vfork				sys_vfork
 190	common	ugetrlimit			sys_getrlimit			compat_sys_getrlimit
 191	common	readahead			sys_readahead			compat_sys_ppc_readahead
-192	32	mmap2				sys_mmap2			compat_sys_ppc_mmap2
+192	32	mmap2				sys_mmap2			compat_sys_mmap2
 193	32	truncate64			sys_truncate64			compat_sys_ppc_truncate64
 194	32	ftruncate64			sys_ftruncate64			compat_sys_ppc_ftruncate64
 195	32	stat64				sys_stat64
@@ -391,7 +391,7 @@
 306	common	timerfd_create			sys_timerfd_create
 307	common	eventfd				sys_eventfd
 308	common	sync_file_range2		sys_sync_file_range2		compat_sys_ppc_sync_file_range2
-309	nospu	fallocate			sys_fallocate			compat_sys_ppc_fallocate
+309	nospu	fallocate			sys_fallocate			compat_sys_fallocate
 310	nospu	subpage_prot			sys_subpage_prot
 311	32	timerfd_settime			sys_timerfd_settime32
 311	64	timerfd_settime			sys_timerfd_settime
-- 
2.34.1