arch: uapi: asm: mman.h: Support MADV_FREE for madvise()

PATCH New Chen Gang 1 participant 1 message Dec 1, 2014

Subsystems (4)

MIPS PA-RISC architecture Alpha port Tensilica Xtensa port (xtensa)

lore

Share & tools

lore

Chen Gang

author

2014-12-01 20:41 UTC #0 lore raw

PATCH 1/1 arch: uapi: asm: mman.h: Support MADV_FREE for madvise()

At present, kernel supports madvise(MADV_FREE), so can benefit to all related architectures (can grep MADV_WILLNEED or MADV_REMOVE in "arch/" to know about all related architectures).

The related git commit: "4fb10ba mm: support madvise(MADV_FREE)".

The related error (with allmodconfig under parisc):

CC mm/madvise.o
mm/madvise.c: In function 'madvise_need_mmap_write':
mm/madvise.c:42:7: error: 'MADV_FREE' undeclared (first use in this function)

    case MADV_FREE:
       ^
  mm/madvise.c:42:7: note: each undeclared identifier is reported only once for each function it appears in
  mm/madvise.c: In function 'madvise_vma':
  mm/madvise.c:534:7: error: 'MADV_FREE' undeclared (first use in this function)
    case MADV_FREE:
       ^
  mm/madvise.c: In function 'madvise_behavior_valid':
  mm/madvise.c:561:7: error: 'MADV_FREE' undeclared (first use in this function)
    case MADV_FREE:
       ^

make[1]: *** [mm/madvise.o] Error 1
make: *** [mm] Error 2

Signed-off-by Chen Gang <[email protected]>

---
 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(+)

arch/alpha/include/uapi/asm/mman.h +1 -0

index 0086b47..836fbd4 100644
@@ -44,6 +44,7 @@
 #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 */

arch/mips/include/uapi/asm/mman.h +1 -0

index cfcb876..106e741 100644
@@ -67,6 +67,7 @@
 #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 */

arch/parisc/include/uapi/asm/mman.h +1 -0

index 294d251..6cb8db7 100644
@@ -40,6 +40,7 @@
 #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 */

arch/xtensa/include/uapi/asm/mman.h +1 -0

index 201aec0..1b19f25 100644
@@ -80,6 +80,7 @@
 #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 */

Signature · 1 line

1.9.3