[PATCH] sys_move_pages: 32bit support (i386, x86_64)
sys_move_pages() support for 32bit (i386 plus x86_64 compat layer)
Add support for move_pages() on i386 and also add the compat functions
necessary to run 32 bit binaries on x86_64.
Add compat_sys_move_pages to the x86_64 32bit binary layer. Note that it is
not up to date so I added the missing pieces. Not sure if this is done the
right way.
[akpm@osdl.org: compile fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S
index af56987..dd63d47 100644
--- a/arch/i386/kernel/syscall_table.S
+++ b/arch/i386/kernel/syscall_table.S
@@ -316,3 +316,4 @@
.long sys_sync_file_range
.long sys_tee /* 315 */
.long sys_vmsplice
+ .long sys_move_pages
diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S
index 5a92fed..4ec594a 100644
--- a/arch/x86_64/ia32/ia32entry.S
+++ b/arch/x86_64/ia32/ia32entry.S
@@ -696,4 +696,5 @@
.quad sys_sync_file_range
.quad sys_tee
.quad compat_sys_vmsplice
+ .quad compat_sys_move_pages
ia32_syscall_end:
diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h
index de2ccc1..fc1c8dd 100644
--- a/include/asm-i386/unistd.h
+++ b/include/asm-i386/unistd.h
@@ -322,10 +322,11 @@
#define __NR_sync_file_range 314
#define __NR_tee 315
#define __NR_vmsplice 316
+#define __NR_move_pages 317
#ifdef __KERNEL__
-#define NR_syscalls 317
+#define NR_syscalls 318
/*
* user-visible error numbers are in the range -1 - -128: see
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 7e3f234..e42738c 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -521,6 +521,11 @@
const int __user *nodes,
int __user *status,
int flags);
+asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
+ void __user *pages,
+ const int __user *nodes,
+ int __user *status,
+ int flags);
asmlinkage long sys_mbind(unsigned long start, unsigned long len,
unsigned long mode,
unsigned long __user *nmask,
diff --git a/kernel/compat.c b/kernel/compat.c
index c1601a8..ccea93e 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -21,6 +21,7 @@
#include <linux/unistd.h>
#include <linux/security.h>
#include <linux/timex.h>
+#include <linux/migrate.h>
#include <asm/uaccess.h>
@@ -934,3 +935,25 @@
return ret;
}
+
+#ifdef CONFIG_NUMA
+asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
+ void __user *pages32,
+ const int __user *nodes,
+ int __user *status,
+ int flags)
+{
+ const void __user * __user *pages;
+ int i;
+
+ pages = compat_alloc_user_space(nr_pages * sizeof(void *));
+ for (i = 0; i < nr_pages; i++) {
+ compat_uptr_t p;
+
+ if (get_user(p, (compat_uptr_t *)(pages32 + i)) ||
+ put_user(compat_ptr(p), pages + i))
+ return -EFAULT;
+ }
+ return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
+}
+#endif
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 5972297..6991bec 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -133,3 +133,4 @@
cond_syscall(sys_madvise);
cond_syscall(sys_mremap);
cond_syscall(sys_remap_file_pages);
+cond_syscall(compat_sys_move_pages);