mm: wire up syscall process_mrelease

Split off from prev patch in the series that implements the syscall.

Link: https://lkml.kernel.org/r/20210809185259.405936-2-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Jan Engelhardt <jengelh@inai.de>
Cc: Jann Horn <jannh@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Tim Murray <timmurray@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index a17687e..605645e 100644 (file)
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -486,3 +486,5 @@
 554    common  landlock_create_ruleset         sys_landlock_create_ruleset
 555    common  landlock_add_rule               sys_landlock_add_rule
 556    common  landlock_restrict_self          sys_landlock_restrict_self
+# 557 reserved for memfd_secret
+558    common  process_mrelease                sys_process_mrelease

diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index c5df117..2f32eb8 100644 (file)
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -460,3 +460,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 727bfc3..3cb206a 100644 (file)
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -38,7 +38,7 @@
 #define __ARM_NR_compat_set_tls                (__ARM_NR_COMPAT_BASE + 5)
 #define __ARM_NR_COMPAT_END            (__ARM_NR_COMPAT_BASE + 0x800)
 
-#define __NR_compat_syscalls           447
+#define __NR_compat_syscalls           449
 #endif
 
 #define __ARCH_WANT_SYS_CLONE

diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 99ffcaf..0f49cdb 100644 (file)
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -901,6 +901,8 @@ __SYSCALL(__NR_landlock_create_ruleset, sys_landlock_create_ruleset)
 __SYSCALL(__NR_landlock_add_rule, sys_landlock_add_rule)
 #define __NR_landlock_restrict_self 446
 __SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
+#define __NR_process_mrelease 448
+__SYSCALL(__NR_process_mrelease, sys_process_mrelease)
 
 /*
  * Please add new compat syscalls above this comment and update

diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
index 6d07742..9bf45f2 100644 (file)
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -367,3 +367,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 541bc1b..f1f98ee 100644 (file)
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -446,3 +446,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index a176fac..da49ddd 100644 (file)
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -452,3 +452,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index c2d2e19..56c8d3c 100644 (file)
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -385,3 +385,5 @@
 444    n32     landlock_create_ruleset         sys_landlock_create_ruleset
 445    n32     landlock_add_rule               sys_landlock_add_rule
 446    n32     landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    n32     process_mrelease                sys_process_mrelease

diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index ac653d0..1ca7bc3 100644 (file)
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -361,3 +361,5 @@
 444    n64     landlock_create_ruleset         sys_landlock_create_ruleset
 445    n64     landlock_add_rule               sys_landlock_add_rule
 446    n64     landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    n64     process_mrelease                sys_process_mrelease

diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 253f2cd..fd3a9df 100644 (file)
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -434,3 +434,5 @@
 444    o32     landlock_create_ruleset         sys_landlock_create_ruleset
 445    o32     landlock_add_rule               sys_landlock_add_rule
 446    o32     landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    o32     process_mrelease                sys_process_mrelease

diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index e26187b..040df1b 100644 (file)
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -444,3 +444,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index aef2a29..d8ebd7d 100644 (file)
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -526,3 +526,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index 64d51ab..57233ac 100644 (file)
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -449,3 +449,5 @@
 444  common    landlock_create_ruleset sys_landlock_create_ruleset     sys_landlock_create_ruleset
 445  common    landlock_add_rule       sys_landlock_add_rule           sys_landlock_add_rule
 446  common    landlock_restrict_self  sys_landlock_restrict_self      sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448  common    process_mrelease        sys_process_mrelease            sys_process_mrelease

diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index e0a70be..2f6e95e 100644 (file)
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -449,3 +449,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 603f5a8..42fc290 100644 (file)
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -492,3 +492,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index ce763a1..661a03b 100644 (file)
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -452,3 +452,4 @@
 445    i386    landlock_add_rule       sys_landlock_add_rule
 446    i386    landlock_restrict_self  sys_landlock_restrict_self
 447    i386    memfd_secret            sys_memfd_secret
+448    i386    process_mrelease        sys_process_mrelease

diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index f6b5779..807b6a1 100644 (file)
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -369,6 +369,7 @@
 445    common  landlock_add_rule       sys_landlock_add_rule
 446    common  landlock_restrict_self  sys_landlock_restrict_self
 447    common  memfd_secret            sys_memfd_secret
+448    common  process_mrelease        sys_process_mrelease
 
 #
 # Due to a historical design error, certain syscalls are numbered differently

diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 235d67d..f438495 100644 (file)
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -417,3 +417,5 @@
 444    common  landlock_create_ruleset         sys_landlock_create_ruleset
 445    common  landlock_add_rule               sys_landlock_add_rule
 446    common  landlock_restrict_self          sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448    common  process_mrelease                sys_process_mrelease

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 69c9a70..00bc170 100644 (file)
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -915,6 +915,7 @@ asmlinkage long sys_mincore(unsigned long start, size_t len,
 asmlinkage long sys_madvise(unsigned long start, size_t len, int behavior);
 asmlinkage long sys_process_madvise(int pidfd, const struct iovec __user *vec,
                        size_t vlen, int behavior, unsigned int flags);
+asmlinkage long sys_process_mrelease(int pidfd, unsigned int flags);
 asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
                        unsigned long prot, unsigned long pgoff,
                        unsigned long flags);

diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index a9d6fcd..14c8fe8 100644 (file)
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -877,9 +877,11 @@ __SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
 #define __NR_memfd_secret 447
 __SYSCALL(__NR_memfd_secret, sys_memfd_secret)
 #endif
+#define __NR_process_mrelease 448
+__SYSCALL(__NR_process_mrelease, sys_process_mrelease)
 
 #undef __NR_syscalls
-#define __NR_syscalls 448
+#define __NR_syscalls 449
 
 /*
  * 32 bit systems traditionally used different

diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 30971b1..18a9c2c 100644 (file)
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -289,6 +289,7 @@ COND_SYSCALL(munlockall);
 COND_SYSCALL(mincore);
 COND_SYSCALL(madvise);
 COND_SYSCALL(process_madvise);
+COND_SYSCALL(process_mrelease);
 COND_SYSCALL(remap_file_pages);
 COND_SYSCALL(mbind);
 COND_SYSCALL_COMPAT(mbind);