Commit 1b2db9fb authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

[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: default avatarChristoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b63d64a3

arch/i386/kernel/syscall_table.S

+1 −0
Original line number Diff line number Diff line
@@ -316,3 +316,4 @@ ENTRY(sys_call_table) 
	.long sys_sync_file_range

	.long sys_tee			/* 315 */

	.long sys_vmsplice

	.long sys_move_pages

arch/x86_64/ia32/ia32entry.S

+1 −0
Original line number Diff line number Diff line
@@ -696,4 +696,5 @@ ia32_sys_call_table: 
	.quad sys_sync_file_range

	.quad sys_tee

	.quad compat_sys_vmsplice

	.quad compat_sys_move_pages

ia32_syscall_end:

include/asm-i386/unistd.h

+2 −1
Original line number Diff line number Diff line
@@ -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

include/linux/syscalls.h

+5 −0
Original line number Diff line number Diff line
@@ -521,6 +521,11 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages, 
				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,

kernel/compat.c

+23 −0
Original line number Diff line number Diff line
@@ -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 @@ asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) 


	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

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