The patch titled
Subject: mm: mlock: add new mlock system call
has been removed from the -mm tree. Its filename was
mm-mlock-add-new-mlock-system-call.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Eric B Munson <emunson@xxxxxxxxxx>
Subject: mm: mlock: add new mlock system call
With the refactored mlock code, introduce a new system call for mlock.
The new call will allow the user to specify what lock states are being
added. mlock2 is trivial at the moment, but a follow on patch will add a
new mlock state making it useful.
Signed-off-by: Eric B Munson <emunson@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/entry/syscalls/syscall_32.tbl | 1 +
arch/x86/entry/syscalls/syscall_64.tbl | 1 +
include/linux/syscalls.h | 2 ++
include/uapi/asm-generic/unistd.h | 4 +++-
kernel/sys_ni.c | 1 +
mm/mlock.c | 8 ++++++++
6 files changed, 16 insertions(+), 1 deletion(-)
diff -puN arch/x86/entry/syscalls/syscall_32.tbl~mm-mlock-add-new-mlock-system-call arch/x86/entry/syscalls/syscall_32.tbl
--- a/arch/x86/entry/syscalls/syscall_32.tbl~mm-mlock-add-new-mlock-system-call
+++ a/arch/x86/entry/syscalls/syscall_32.tbl
@@ -382,3 +382,4 @@
373 i386 shutdown sys_shutdown
374 i386 userfaultfd sys_userfaultfd
375 i386 membarrier sys_membarrier
+376 i386 mlock2 sys_mlock2
diff -puN arch/x86/entry/syscalls/syscall_64.tbl~mm-mlock-add-new-mlock-system-call arch/x86/entry/syscalls/syscall_64.tbl
--- a/arch/x86/entry/syscalls/syscall_64.tbl~mm-mlock-add-new-mlock-system-call
+++ a/arch/x86/entry/syscalls/syscall_64.tbl
@@ -331,6 +331,7 @@
322 64 execveat stub_execveat
323 common userfaultfd sys_userfaultfd
324 common membarrier sys_membarrier
+325 common mlock2 sys_mlock2
#
# x32-specific system call numbers start at 512 to avoid cache impact
diff -puN include/linux/syscalls.h~mm-mlock-add-new-mlock-system-call include/linux/syscalls.h
--- a/include/linux/syscalls.h~mm-mlock-add-new-mlock-system-call
+++ a/include/linux/syscalls.h
@@ -887,4 +887,6 @@ asmlinkage long sys_execveat(int dfd, co
asmlinkage long sys_membarrier(int cmd, int flags);
+asmlinkage long sys_mlock2(unsigned long start, size_t len, int flags);
+
#endif
diff -puN include/uapi/asm-generic/unistd.h~mm-mlock-add-new-mlock-system-call include/uapi/asm-generic/unistd.h
--- a/include/uapi/asm-generic/unistd.h~mm-mlock-add-new-mlock-system-call
+++ a/include/uapi/asm-generic/unistd.h
@@ -713,9 +713,11 @@ __SC_COMP(__NR_execveat, sys_execveat, c
__SYSCALL(__NR_userfaultfd, sys_userfaultfd)
#define __NR_membarrier 283
__SYSCALL(__NR_membarrier, sys_membarrier)
+#define __NR_mlock2 284
+__SYSCALL(__NR_mlock2, sys_mlock2)
#undef __NR_syscalls
-#define __NR_syscalls 284
+#define __NR_syscalls 285
/*
* All syscalls below here should go away really,
diff -puN kernel/sys_ni.c~mm-mlock-add-new-mlock-system-call kernel/sys_ni.c
--- a/kernel/sys_ni.c~mm-mlock-add-new-mlock-system-call
+++ a/kernel/sys_ni.c
@@ -194,6 +194,7 @@ cond_syscall(sys_mlock);
cond_syscall(sys_munlock);
cond_syscall(sys_mlockall);
cond_syscall(sys_munlockall);
+cond_syscall(sys_mlock2);
cond_syscall(sys_mincore);
cond_syscall(sys_madvise);
cond_syscall(sys_mremap);
diff -puN mm/mlock.c~mm-mlock-add-new-mlock-system-call mm/mlock.c
--- a/mm/mlock.c~mm-mlock-add-new-mlock-system-call
+++ a/mm/mlock.c
@@ -644,6 +644,14 @@ SYSCALL_DEFINE2(mlock, unsigned long, st
return do_mlock(start, len, VM_LOCKED);
}
+SYSCALL_DEFINE3(mlock2, unsigned long, start, size_t, len, int, flags)
+{
+ if (flags)
+ return -EINVAL;
+
+ return do_mlock(start, len, VM_LOCKED);
+}
+
SYSCALL_DEFINE2(munlock, unsigned long, start, size_t, len)
{
int ret;
_
Patches currently in -mm which might be from emunson@xxxxxxxxxx are
mips-add-entry-for-new-mlock2-syscall.patch
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