Merge branch 'akpm' (patches from Andrew)

Merge more updates from Andrew Morton:
 "VM:
   - z3fold fixes and enhancements by Henry Burns and Vitaly Wool

   - more accurate reclaimed slab caches calculations by Yafang Shao

   - fix MAP_UNINITIALIZED UAPI symbol to not depend on config, by
     Christoph Hellwig

   - !CONFIG_MMU fixes by Christoph Hellwig

   - new novmcoredd parameter to omit device dumps from vmcore, by
     Kairui Song

   - new test_meminit module for testing heap and pagealloc
     initialization, by Alexander Potapenko

   - ioremap improvements for huge mappings, by Anshuman Khandual

   - generalize kprobe page fault handling, by Anshuman Khandual

   - device-dax hotplug fixes and improvements, by Pavel Tatashin

   - enable synchronous DAX fault on powerpc, by Aneesh Kumar K.V

   - add pte_devmap() support for arm64, by Robin Murphy

   - unify locked_vm accounting with a helper, by Daniel Jordan

   - several misc fixes

  core/lib:
   - new typeof_member() macro including some users, by Alexey Dobriyan

   - make BIT() and GENMASK() available in asm, by Masahiro Yamada

   - changed LIST_POISON2 on x86_64 to 0xdead000000000122 for better
     code generation, by Alexey Dobriyan

   - rbtree code size optimizations, by Michel Lespinasse

   - convert struct pid count to refcount_t, by Joel Fernandes

  get_maintainer.pl:
   - add --no-moderated switch to skip moderated ML's, by Joe Perches

  misc:
   - ptrace PTRACE_GET_SYSCALL_INFO interface

   - coda updates

   - gdb scripts, various"

[ Using merge message suggestion from Vlastimil Babka, with some editing - Linus ]

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (100 commits)
  fs/select.c: use struct_size() in kmalloc()
  mm: add account_locked_vm utility function
  arm64: mm: implement pte_devmap support
  mm: introduce ARCH_HAS_PTE_DEVMAP
  mm: clean up is_device_*_page() definitions
  mm/mmap: move common defines to mman-common.h
  mm: move MAP_SYNC to asm-generic/mman-common.h
  device-dax: "Hotremove" persistent memory that is used like normal RAM
  mm/hotplug: make remove_memory() interface usable
  device-dax: fix memory and resource leak if hotplug fails
  include/linux/lz4.h: fix spelling and copy-paste errors in documentation
  ipc/mqueue.c: only perform resource calculation if user valid
  include/asm-generic/bug.h: fix "cut here" for WARN_ON for __WARN_TAINT architectures
  scripts/gdb: add helpers to find and list devices
  scripts/gdb: add lx-genpd-summary command
  drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl
  kernel/pid.c: convert struct pid count to refcount_t
  drivers/rapidio/devices/rio_mport_cdev.c: NUL terminate some strings
  select: shift restore_saved_sigmask_unless() into poll_select_copy_remaining()
  select: change do_poll() to return -ERESTARTNOHAND rather than -EINTR
  ...

3 files changed, 73 insertions, 46 deletions

diff --git a/include/uapi/linux/coda.h b/include/uapi/linux/coda.h
index 695fade33c64..aa34c2dcae8d 100644
--- a/include/uapi/linux/coda.h
+++ b/include/uapi/linux/coda.h
@@ -86,10 +86,6 @@ typedef unsigned long long u_quad_t;
 
 #define inline
 
-struct timespec {
-        long       ts_sec;
-        long       ts_nsec;
-};
 #else  /* DJGPP but not KERNEL */
 #include <sys/time.h>
 typedef unsigned long long u_quad_t;
@@ -110,13 +106,6 @@ typedef unsigned long long u_quad_t;
 #define cdev_t dev_t
 #endif
 
-#ifdef __CYGWIN32__
-struct timespec {
-        time_t  tv_sec;         /* seconds */
-        long    tv_nsec;        /* nanoseconds */
-};
-#endif
-
 #ifndef __BIT_TYPES_DEFINED__
 #define __BIT_TYPES_DEFINED__
 typedef signed char           int8_t;
@@ -211,6 +200,11 @@ struct CodaFid {
  */
 enum coda_vtype { C_VNON, C_VREG, C_VDIR, C_VBLK, C_VCHR, C_VLNK, C_VSOCK, C_VFIFO, C_VBAD };
 
+struct coda_timespec {
+        int64_t         tv_sec;         /* seconds */
+        long            tv_nsec;        /* nanoseconds */
+};
+
 struct coda_vattr {
         long            va_type;        /* vnode type (for create) */
         u_short         va_mode;        /* files access mode and type */
@@ -220,9 +214,9 @@ struct coda_vattr {
         long            va_fileid;      /* file id */
         u_quad_t        va_size;        /* file size in bytes */
         long            va_blocksize;   /* blocksize preferred for i/o */
-        struct timespec va_atime;       /* time of last access */
-        struct timespec va_mtime;       /* time of last modification */
-        struct timespec va_ctime;       /* time file changed */
+        struct coda_timespec va_atime;  /* time of last access */
+        struct coda_timespec va_mtime;  /* time of last modification */
+        struct coda_timespec va_ctime;  /* time file changed */
         u_long          va_gen;         /* generation number of file */
         u_long          va_flags;       /* flags defined for file */
         cdev_t          va_rdev;        /* device special file represents */
@@ -277,7 +271,8 @@ struct coda_statfs {
 #define CODA_STATFS      34
 #define CODA_STORE       35
 #define CODA_RELEASE     36
-#define CODA_NCALLS 37
+#define CODA_ACCESS_INTENT 37
+#define CODA_NCALLS 38
 
 #define DOWNCALL(opcode) (opcode >= CODA_REPLACE && opcode <= CODA_PURGEFID)
 
@@ -287,7 +282,12 @@ struct coda_statfs {
 
 #define CIOC_KERNEL_VERSION _IOWR('c', 10, size_t)
 
-#define CODA_KERNEL_VERSION 3 /* 128-bit file identifiers */
+//      CODA_KERNEL_VERSION 0 /* don't care about kernel version number */
+//      CODA_KERNEL_VERSION 1 /* The old venus 4.6 compatible interface */
+//      CODA_KERNEL_VERSION 2 /* venus_lookup gets an extra parameter */
+//      CODA_KERNEL_VERSION 3 /* 128-bit file identifiers */
+//      CODA_KERNEL_VERSION 4 /* 64-bit timespec */
+#define CODA_KERNEL_VERSION 5 /* access intent support */
 
 /*
  *        Venus <-> Coda  RPC arguments
@@ -295,8 +295,8 @@ struct coda_statfs {
 struct coda_in_hdr {
     u_int32_t opcode;
     u_int32_t unique;       /* Keep multiple outstanding msgs distinct */
-    pid_t pid;
-    pid_t pgid;
+    __kernel_pid_t pid;
+    __kernel_pid_t pgid;
     vuid_t uid;
 };
 
@@ -642,6 +642,25 @@ struct coda_statfs_out {
     struct coda_statfs stat;
 };
 
+#define CODA_ACCESS_TYPE_READ           1
+#define CODA_ACCESS_TYPE_WRITE          2
+#define CODA_ACCESS_TYPE_MMAP           3
+#define CODA_ACCESS_TYPE_READ_FINISH    4
+#define CODA_ACCESS_TYPE_WRITE_FINISH   5
+
+/* coda_access_intent: NO_OUT */
+struct coda_access_intent_in {
+        struct coda_in_hdr ih;
+        struct CodaFid VFid;
+        int count;
+        int pos;
+        int type;
+};
+
+struct coda_access_intent_out {
+        struct coda_out_hdr out;
+};
+
 /* 
  * Occasionally, we don't cache the fid returned by CODA_LOOKUP. 
  * For instance, if the fid is inconsistent. 
@@ -673,6 +692,7 @@ union inputArgs {
     struct coda_open_by_fd_in coda_open_by_fd;
     struct coda_open_by_path_in coda_open_by_path;
     struct coda_statfs_in coda_statfs;
+    struct coda_access_intent_in coda_access_intent;
 };
 
 union outputArgs {
diff --git a/include/uapi/linux/coda_psdev.h b/include/uapi/linux/coda_psdev.h
deleted file mode 100644
index aa6623efd2dd..000000000000
--- a/include/uapi/linux/coda_psdev.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI__CODA_PSDEV_H
-#define _UAPI__CODA_PSDEV_H
-
-#include <linux/magic.h>
-
-#define CODA_PSDEV_MAJOR 67
-#define MAX_CODADEVS  5    /* how many do we allow */
-
-
-/* messages between coda filesystem in kernel and Venus */
-struct upc_req {
-        struct list_head    uc_chain;
-        caddr_t             uc_data;
-        u_short             uc_flags;
-        u_short             uc_inSize;  /* Size is at most 5000 bytes */
-        u_short             uc_outSize;
-        u_short             uc_opcode;  /* copied from data to save lookup */
-        int                 uc_unique;
-        wait_queue_head_t   uc_sleep;   /* process' wait queue */
-};
-
-#define CODA_REQ_ASYNC  0x1
-#define CODA_REQ_READ   0x2
-#define CODA_REQ_WRITE  0x4
-#define CODA_REQ_ABORT  0x8
-
-#endif /* _UAPI__CODA_PSDEV_H */
diff --git a/include/uapi/linux/ptrace.h b/include/uapi/linux/ptrace.h
index d5a1b8a492b9..a71b6e3b03eb 100644
--- a/include/uapi/linux/ptrace.h
+++ b/include/uapi/linux/ptrace.h
@@ -73,6 +73,41 @@ struct seccomp_metadata {
         __u64 flags;            /* Output: filter's flags */
 };
 
+#define PTRACE_GET_SYSCALL_INFO         0x420e
+#define PTRACE_SYSCALL_INFO_NONE        0
+#define PTRACE_SYSCALL_INFO_ENTRY       1
+#define PTRACE_SYSCALL_INFO_EXIT        2
+#define PTRACE_SYSCALL_INFO_SECCOMP     3
+
+struct ptrace_syscall_info {
+        __u8 op;        /* PTRACE_SYSCALL_INFO_* */
+        __u32 arch __attribute__((__aligned__(sizeof(__u32))));
+        __u64 instruction_pointer;
+        __u64 stack_pointer;
+        union {
+                struct {
+                        __u64 nr;
+                        __u64 args[6];
+                } entry;
+                struct {
+                        __s64 rval;
+                        __u8 is_error;
+                } exit;
+                struct {
+                        __u64 nr;
+                        __u64 args[6];
+                        __u32 ret_data;
+                } seccomp;
+        };
+};
+
+/*
+ * These values are stored in task->ptrace_message
+ * by tracehook_report_syscall_* to describe the current syscall-stop.
+ */
+#define PTRACE_EVENTMSG_SYSCALL_ENTRY   1
+#define PTRACE_EVENTMSG_SYSCALL_EXIT    2
+
 /* Read signals from a shared (process wide) queue */
 #define PTRACE_PEEKSIGINFO_SHARED       (1 << 0)