Most architectures use asm-generic, but alpha, mips, parisc, xtensa
need their own definitions.

This patch defines MADV_FREE for them so it should fix build break
for their architectures.

Maybe, I should split and feed piecies to arch maintainers but
included here for mmotm convenience.

Cc: Michael Kerrisk <mtk.manpa...@gmail.com>
Cc: Richard Henderson <r...@twiddle.net>
Cc: Ivan Kokshaysky <i...@jurassic.park.msu.ru>
Cc: "James E.J. Bottomley" <j...@parisc-linux.org>
Cc: Helge Deller <del...@gmx.de>
Cc: Ralf Baechle <r...@linux-mips.org>
Cc: Chris Zankel <ch...@zankel.net>
Acked-by: Max Filippov <jcmvb...@gmail.com>
Reported-by: kbuild test robot <fengguang...@intel.com>
Signed-off-by: Minchan Kim <minc...@kernel.org>
---
 arch/alpha/include/uapi/asm/mman.h  | 1 +
 arch/mips/include/uapi/asm/mman.h   | 1 +
 arch/parisc/include/uapi/asm/mman.h | 1 +
 arch/xtensa/include/uapi/asm/mman.h | 1 +
 4 files changed, 4 insertions(+)

diff --git a/arch/alpha/include/uapi/asm/mman.h 
b/arch/alpha/include/uapi/asm/mman.h
index f2f949671798..d828beb5e69b 100644
--- a/arch/alpha/include/uapi/asm/mman.h
+++ b/arch/alpha/include/uapi/asm/mman.h
@@ -47,6 +47,7 @@
 #define MADV_WILLNEED  3               /* will need these pages */
 #define        MADV_SPACEAVAIL 5               /* ensure resources are 
available */
 #define MADV_DONTNEED  6               /* don't need these pages */
+#define MADV_FREE      7               /* free pages only if memory pressure */
 
 /* common/generic parameters */
 #define MADV_REMOVE    9               /* remove these pages & resources */
diff --git a/arch/mips/include/uapi/asm/mman.h 
b/arch/mips/include/uapi/asm/mman.h
index 97c03f468924..a6f8daff8e3b 100644
--- a/arch/mips/include/uapi/asm/mman.h
+++ b/arch/mips/include/uapi/asm/mman.h
@@ -73,6 +73,7 @@
 #define MADV_SEQUENTIAL 2              /* expect sequential page references */
 #define MADV_WILLNEED  3               /* will need these pages */
 #define MADV_DONTNEED  4               /* don't need these pages */
+#define MADV_FREE      5               /* free pages only if memory pressure */
 
 /* common parameters: try to keep these consistent across architectures */
 #define MADV_REMOVE    9               /* remove these pages & resources */
diff --git a/arch/parisc/include/uapi/asm/mman.h 
b/arch/parisc/include/uapi/asm/mman.h
index dd4d1876a020..bda94f0d0b94 100644
--- a/arch/parisc/include/uapi/asm/mman.h
+++ b/arch/parisc/include/uapi/asm/mman.h
@@ -43,6 +43,7 @@
 #define MADV_SPACEAVAIL 5               /* insure that resources are reserved 
*/
 #define MADV_VPS_PURGE  6               /* Purge pages from VM page cache */
 #define MADV_VPS_INHERIT 7              /* Inherit parents page size */
+#define MADV_FREE      8               /* free pages only if memory pressure */
 
 /* common/generic parameters */
 #define MADV_REMOVE    9               /* remove these pages & resources */
diff --git a/arch/xtensa/include/uapi/asm/mman.h 
b/arch/xtensa/include/uapi/asm/mman.h
index 360944e1da52..83c5150b06f9 100644
--- a/arch/xtensa/include/uapi/asm/mman.h
+++ b/arch/xtensa/include/uapi/asm/mman.h
@@ -86,6 +86,7 @@
 #define MADV_SEQUENTIAL        2               /* expect sequential page 
references */
 #define MADV_WILLNEED  3               /* will need these pages */
 #define MADV_DONTNEED  4               /* don't need these pages */
+#define MADV_FREE      5               /* free pages only if memory pressure */
 
 /* common parameters: try to keep these consistent across architectures */
 #define MADV_REMOVE    9               /* remove these pages & resources */
-- 
1.9.1

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