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Backmerge tag 'v4.7-rc2' into drm-next

Browse Source 
Daniel has a pull request that relies on stuff in fixes that are in rc2.
This commit is contained in:
Dave Airlie
2016-06-09 11:01:49 +10:00
parent 66fd7a66e8 af8c34ce6a
commit fa625c1956
256 changed files with 2491 additions and 1525 deletions
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38
Documentation/DocBook/device-drivers.tmpl
View File

@@ -128,16 +128,44 @@ X!Edrivers/base/interface.c
!Edrivers/base/platform.c
!Edrivers/base/bus.c
</sect1>
<sect1><title>Device Drivers DMA Management</title>
<sect1>
<title>Buffer Sharing and Synchronization</title>
<para>
The dma-buf subsystem provides the framework for sharing buffers
for hardware (DMA) access across multiple device drivers and
subsystems, and for synchronizing asynchronous hardware access.
</para>
<para>
This is used, for example, by drm "prime" multi-GPU support, but
is of course not limited to GPU use cases.
</para>
<para>
The three main components of this are: (1) dma-buf, representing
a sg_table and exposed to userspace as a file descriptor to allow
passing between devices, (2) fence, which provides a mechanism
to signal when one device as finished access, and (3) reservation,
which manages the shared or exclusive fence(s) associated with
the buffer.
</para>
<sect2><title>dma-buf</title>
!Edrivers/dma-buf/dma-buf.c
!Edrivers/dma-buf/fence.c
!Edrivers/dma-buf/seqno-fence.c
!Iinclude/linux/fence.h
!Iinclude/linux/seqno-fence.h
!Iinclude/linux/dma-buf.h
</sect2>
<sect2><title>reservation</title>
!Pdrivers/dma-buf/reservation.c Reservation Object Overview
!Edrivers/dma-buf/reservation.c
!Iinclude/linux/reservation.h
</sect2>
<sect2><title>fence</title>
!Edrivers/dma-buf/fence.c
!Iinclude/linux/fence.h
!Edrivers/dma-buf/seqno-fence.c
!Iinclude/linux/seqno-fence.h
!Edrivers/dma-buf/sync_file.c
!Iinclude/linux/sync_file.h
</sect2>
</sect1>
<sect1><title>Device Drivers DMA Management</title>
!Edrivers/base/dma-coherent.c
!Edrivers/base/dma-mapping.c
</sect1>

1
Documentation/arm64/silicon-errata.txt
View File

@@ -56,6 +56,7 @@ stable kernels.
| ARM | MMU-500 | #841119,#826419 | N/A |
| | | | |
| Cavium | ThunderX ITS | #22375, #24313 | CAVIUM_ERRATUM_22375 |
| Cavium | ThunderX ITS | #23144 | CAVIUM_ERRATUM_23144 |
| Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 |
| Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 |
| Cavium | ThunderX SMMUv2 | #27704 | N/A |

1
Documentation/devicetree/bindings/display/imx/ldb.txt
View File

@@ -62,6 +62,7 @@ Required properties:
display-timings are used instead.
Optional properties (required if display-timings are used):
- ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing
- display-timings : A node that describes the display timings as defined in
Documentation/devicetree/bindings/display/display-timing.txt.
- fsl,data-mapping : should be "spwg" or "jeida"

145
Documentation/filesystems/devpts.txt
View File

@@ -1,141 +1,26 @@
Each mount of the devpts filesystem is now distinct such that ptys
and their indicies allocated in one mount are independent from ptys
and their indicies in all other mounts.
To support containers, we now allow multiple instances of devpts filesystem,
such that indices of ptys allocated in one instance are independent of indices
allocated in other instances of devpts.
All mounts of the devpts filesystem now create a /dev/pts/ptmx node
with permissions 0000.
To preserve backward compatibility, this support for multiple instances is
enabled only if:
To retain backwards compatibility the a ptmx device node (aka any node
created with "mknod name c 5 2") when opened will look for an instance
of devpts under the name "pts" in the same directory as the ptmx device
node.
- CONFIG_DEVPTS_MULTIPLE_INSTANCES=y, and
- '-o newinstance' mount option is specified while mounting devpts
IOW, devpts now supports both single-instance and multi-instance semantics.
If CONFIG_DEVPTS_MULTIPLE_INSTANCES=n, there is no change in behavior and
this referred to as the "legacy" mode. In this mode, the new mount options
(-o newinstance and -o ptmxmode) will be ignored with a 'bogus option' message
on console.
If CONFIG_DEVPTS_MULTIPLE_INSTANCES=y and devpts is mounted without the
'newinstance' option (as in current start-up scripts) the new mount binds
to the initial kernel mount of devpts. This mode is referred to as the
'single-instance' mode and the current, single-instance semantics are
preserved, i.e PTYs are common across the system.
The only difference between this single-instance mode and the legacy mode
is the presence of new, '/dev/pts/ptmx' node with permissions 0000, which
can safely be ignored.
If CONFIG_DEVPTS_MULTIPLE_INSTANCES=y and 'newinstance' option is specified,
the mount is considered to be in the multi-instance mode and a new instance
of the devpts fs is created. Any ptys created in this instance are independent
of ptys in other instances of devpts. Like in the single-instance mode, the
/dev/pts/ptmx node is present. To effectively use the multi-instance mode,
open of /dev/ptmx must be a redirected to '/dev/pts/ptmx' using a symlink or
bind-mount.
Eg: A container startup script could do the following:
$ chmod 0666 /dev/pts/ptmx
$ rm /dev/ptmx
$ ln -s pts/ptmx /dev/ptmx
$ ns_exec -cm /bin/bash
# We are now in new container
$ umount /dev/pts
$ mount -t devpts -o newinstance lxcpts /dev/pts
$ sshd -p 1234
where 'ns_exec -cm /bin/bash' calls clone() with CLONE_NEWNS flag and execs
/bin/bash in the child process. A pty created by the sshd is not visible in
the original mount of /dev/pts.
As an option instead of placing a /dev/ptmx device node at /dev/ptmx
it is possible to place a symlink to /dev/pts/ptmx at /dev/ptmx or
to bind mount /dev/ptx/ptmx to /dev/ptmx. If you opt for using
the devpts filesystem in this manner devpts should be mounted with
the ptmxmode=0666, or chmod 0666 /dev/pts/ptmx should be called.
Total count of pty pairs in all instances is limited by sysctls:
kernel.pty.max = 4096 - global limit
kernel.pty.reserve = 1024 - reserve for initial instance
kernel.pty.reserve = 1024 - reserved for filesystems mounted from the initial mount namespace
kernel.pty.nr - current count of ptys
Per-instance limit could be set by adding mount option "max=<count>".
This feature was added in kernel 3.4 together with sysctl kernel.pty.reserve.
In kernels older than 3.4 sysctl kernel.pty.max works as per-instance limit.
User-space changes
------------------
In multi-instance mode (i.e '-o newinstance' mount option is specified at least
once), following user-space issues should be noted.
1. If -o newinstance mount option is never used, /dev/pts/ptmx can be ignored
and no change is needed to system-startup scripts.
2. To effectively use multi-instance mode (i.e -o newinstance is specified)
administrators or startup scripts should "redirect" open of /dev/ptmx to
/dev/pts/ptmx using either a bind mount or symlink.
$ mount -t devpts -o newinstance devpts /dev/pts
followed by either
$ rm /dev/ptmx
$ ln -s pts/ptmx /dev/ptmx
$ chmod 666 /dev/pts/ptmx
or
$ mount -o bind /dev/pts/ptmx /dev/ptmx
3. The '/dev/ptmx -> pts/ptmx' symlink is the preferred method since it
enables better error-reporting and treats both single-instance and
multi-instance mounts similarly.
But this method requires that system-startup scripts set the mode of
/dev/pts/ptmx correctly (default mode is 0000). The scripts can set the
mode by, either
- adding ptmxmode mount option to devpts entry in /etc/fstab, or
- using 'chmod 0666 /dev/pts/ptmx'
4. If multi-instance mode mount is needed for containers, but the system
startup scripts have not yet been updated, container-startup scripts
should bind mount /dev/ptmx to /dev/pts/ptmx to avoid breaking single-
instance mounts.
Or, in general, container-startup scripts should use:
mount -t devpts -o newinstance -o ptmxmode=0666 devpts /dev/pts
if [ ! -L /dev/ptmx ]; then
mount -o bind /dev/pts/ptmx /dev/ptmx
fi
When all devpts mounts are multi-instance, /dev/ptmx can permanently be
a symlink to pts/ptmx and the bind mount can be ignored.
5. A multi-instance mount that is not accompanied by the /dev/ptmx to
/dev/pts/ptmx redirection would result in an unusable/unreachable pty.
mount -t devpts -o newinstance lxcpts /dev/pts
immediately followed by:
open("/dev/ptmx")
would create a pty, say /dev/pts/7, in the initial kernel mount.
But /dev/pts/7 would be invisible in the new mount.
6. The permissions for /dev/pts/ptmx node should be specified when mounting
/dev/pts, using the '-o ptmxmode=%o' mount option (default is 0000).
mount -t devpts -o newinstance -o ptmxmode=0644 devpts /dev/pts
The permissions can be later be changed as usual with 'chmod'.
chmod 666 /dev/pts/ptmx
7. A mount of devpts without the 'newinstance' option results in binding to
initial kernel mount. This behavior while preserving legacy semantics,
does not provide strict isolation in a container environment. i.e by
mounting devpts without the 'newinstance' option, a container could
get visibility into the 'host' or root container's devpts.
To workaround this and have strict isolation, all mounts of devpts,
including the mount in the root container, should use the newinstance
option.

93
Documentation/kdump/gdbmacros.txt
View File

@@ -170,21 +170,92 @@ document trapinfo
address the kernel panicked.
end
define dump_log_idx
set $idx = $arg0
if ($argc > 1)
set $prev_flags = $arg1
else
set $prev_flags = 0
end
set $msg = ((struct printk_log *) (log_buf + $idx))
set $prefix = 1
set $newline = 1
set $log = log_buf + $idx + sizeof(*$msg)
# prev & LOG_CONT && !(msg->flags & LOG_PREIX)
if (($prev_flags & 8) && !($msg->flags & 4))
set $prefix = 0
end
# msg->flags & LOG_CONT
if ($msg->flags & 8)
# (prev & LOG_CONT && !(prev & LOG_NEWLINE))
if (($prev_flags & 8) && !($prev_flags & 2))
set $prefix = 0
end
# (!(msg->flags & LOG_NEWLINE))
if (!($msg->flags & 2))
set $newline = 0
end
end
if ($prefix)
printf "[%5lu.%06lu] ", $msg->ts_nsec / 1000000000, $msg->ts_nsec % 1000000000
end
if ($msg->text_len != 0)
eval "printf \"%%%d.%ds\", $log", $msg->text_len, $msg->text_len
end
if ($newline)
printf "\n"
end
if ($msg->dict_len > 0)
set $dict = $log + $msg->text_len
set $idx = 0
set $line = 1
while ($idx < $msg->dict_len)
if ($line)
printf " "
set $line = 0
end
set $c = $dict[$idx]
if ($c == '\0')
printf "\n"
set $line = 1
else
if ($c < ' ' || $c >= 127 || $c == '\\')
printf "\\x%02x", $c
else
printf "%c", $c
end
end
set $idx = $idx + 1
end
printf "\n"
end
end
document dump_log_idx
Dump a single log given its index in the log buffer. The first
parameter is the index into log_buf, the second is optional and
specified the previous log buffer's flags, used for properly
formatting continued lines.
end
define dmesg
set $i = 0
set $end_idx = (log_end - 1) & (log_buf_len - 1)
set $i = log_first_idx
set $end_idx = log_first_idx
set $prev_flags = 0
while ($i < logged_chars)
set $idx = (log_end - 1 - logged_chars + $i) & (log_buf_len - 1)
if ($idx + 100 <= $end_idx) || \
($end_idx <= $idx && $idx + 100 < log_buf_len)
printf "%.100s", &log_buf[$idx]
set $i = $i + 100
while (1)
set $msg = ((struct printk_log *) (log_buf + $i))
if ($msg->len == 0)
set $i = 0
else
printf "%c", log_buf[$idx]
set $i = $i + 1
dump_log_idx $i $prev_flags
set $i = $i + $msg->len
set $prev_flags = $msg->flags
end
if ($i == $end_idx)
loop_break
end
end
end

17
Documentation/networking/dsa/dsa.txt
View File

@@ -369,8 +369,6 @@ does not allocate any driver private context space.
Switch configuration
--------------------
- priv_size: additional size needed by the switch driver for its private context
- tag_protocol: this is to indicate what kind of tagging protocol is supported,
should be a valid value from the dsa_tag_protocol enum
@@ -416,11 +414,6 @@ PHY devices and link management
to the switch port MDIO registers. If unavailable return a negative error
code.
- poll_link: Function invoked by DSA to query the link state of the switch
builtin Ethernet PHYs, per port. This function is responsible for calling
netif_carrier_{on,off} when appropriate, and can be used to poll all ports in a
single call. Executes from workqueue context.
- adjust_link: Function invoked by the PHY library when a slave network device
is attached to a PHY device. This function is responsible for appropriately
configuring the switch port link parameters: speed, duplex, pause based on
@@ -542,6 +535,16 @@ Bridge layer
Bridge VLAN filtering
---------------------
- port_vlan_filtering: bridge layer function invoked when the bridge gets
configured for turning on or off VLAN filtering. If nothing specific needs to
be done at the hardware level, this callback does not need to be implemented.
When VLAN filtering is turned on, the hardware must be programmed with
rejecting 802.1Q frames which have VLAN IDs outside of the programmed allowed
VLAN ID map/rules. If there is no PVID programmed into the switch port,
untagged frames must be rejected as well. When turned off the switch must
accept any 802.1Q frames irrespective of their VLAN ID, and untagged frames are
allowed.
- port_vlan_prepare: bridge layer function invoked when the bridge prepares the
configuration of a VLAN on the given port. If the operation is not supported
by the hardware, this function should return -EOPNOTSUPP to inform the bridge

8
Documentation/networking/ip-sysctl.txt
View File

@@ -1036,15 +1036,17 @@ proxy_arp_pvlan - BOOLEAN
shared_media - BOOLEAN
Send(router) or accept(host) RFC1620 shared media redirects.
Overrides ip_secure_redirects.
Overrides secure_redirects.
shared_media for the interface will be enabled if at least one of
conf/{all,interface}/shared_media is set to TRUE,
it will be disabled otherwise
default TRUE
secure_redirects - BOOLEAN
Accept ICMP redirect messages only for gateways,
listed in default gateway list.
Accept ICMP redirect messages only to gateways listed in the
interface's current gateway list. Even if disabled, RFC1122 redirect
rules still apply.
Overridden by shared_media.
secure_redirects for the interface will be enabled if at least one of
conf/{all,interface}/secure_redirects is set to TRUE,
it will be disabled otherwise

5
Documentation/security/keys.txt
View File

@@ -826,7 +826,8 @@ The keyctl syscall functions are:
(*) Compute a Diffie-Hellman shared secret or public key
long keyctl(KEYCTL_DH_COMPUTE, struct keyctl_dh_params *params,
char *buffer, size_t buflen);
char *buffer, size_t buflen,
void *reserved);
The params struct contains serial numbers for three keys:
@@ -843,6 +844,8 @@ The keyctl syscall functions are:
public key. If the base is the remote public key, the result is
the shared secret.
The reserved argument must be set to NULL.
The buffer length must be at least the length of the prime, or zero.
If the buffer length is nonzero, the length of the result is

2
MAINTAINERS
View File

@@ -7992,6 +7992,7 @@ Q: http://patchwork.ozlabs.org/project/netdev/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
S: Odd Fixes
F: Documentation/devicetree/bindings/net/
F: drivers/net/
F: include/linux/if_*
F: include/linux/netdevice.h
@@ -8947,6 +8948,7 @@ M: Linus Walleij <linus.walleij@linaro.org>
L: linux-gpio@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git
S: Maintained
F: Documentation/devicetree/bindings/pinctrl/
F: drivers/pinctrl/
F: include/linux/pinctrl/

2
Makefile
View File

@@ -1,7 +1,7 @@
VERSION = 4
PATCHLEVEL = 7
SUBLEVEL = 0
EXTRAVERSION = -rc1
EXTRAVERSION = -rc2
NAME = Psychotic Stoned Sheep
# *DOCUMENTATION*

2
arch/arm/kernel/ptrace.c
View File

@@ -733,8 +733,8 @@ static int vfp_set(struct task_struct *target,
if (ret)
return ret;
vfp_flush_hwstate(thread);
thread->vfpstate.hard = new_vfp;
vfp_flush_hwstate(thread);
return 0;
}

21
arch/arm64/Kconfig
View File

@@ -113,6 +113,18 @@ config ARCH_PHYS_ADDR_T_64BIT
config MMU
def_bool y
config ARM64_PAGE_SHIFT
int
default 16 if ARM64_64K_PAGES
default 14 if ARM64_16K_PAGES
default 12
config ARM64_CONT_SHIFT
int
default 5 if ARM64_64K_PAGES
default 7 if ARM64_16K_PAGES
default 4
config ARCH_MMAP_RND_BITS_MIN
default 14 if ARM64_64K_PAGES
default 16 if ARM64_16K_PAGES
@@ -426,6 +438,15 @@ config CAVIUM_ERRATUM_22375
If unsure, say Y.
config CAVIUM_ERRATUM_23144
bool "Cavium erratum 23144: ITS SYNC hang on dual socket system"
depends on NUMA
default y
help
ITS SYNC command hang for cross node io and collections/cpu mapping.
If unsure, say Y.
config CAVIUM_ERRATUM_23154
bool "Cavium erratum 23154: Access to ICC_IAR1_EL1 is not sync'ed"
default y

25
arch/arm64/Kconfig.debug
View File

@@ -12,7 +12,8 @@ config ARM64_PTDUMP
who are working in architecture specific areas of the kernel.
It is probably not a good idea to enable this feature in a production
kernel.
If in doubt, say "N"
If in doubt, say N.
config PID_IN_CONTEXTIDR
bool "Write the current PID to the CONTEXTIDR register"
@@ -38,15 +39,15 @@ config ARM64_RANDOMIZE_TEXT_OFFSET
value.
config DEBUG_SET_MODULE_RONX
bool "Set loadable kernel module data as NX and text as RO"
depends on MODULES
help
This option helps catch unintended modifications to loadable
kernel module's text and read-only data. It also prevents execution
of module data. Such protection may interfere with run-time code
patching and dynamic kernel tracing - and they might also protect
against certain classes of kernel exploits.
If in doubt, say "N".
bool "Set loadable kernel module data as NX and text as RO"
depends on MODULES
default y
help
Is this is set, kernel module text and rodata will be made read-only.
This is to help catch accidental or malicious attempts to change the
kernel's executable code.
If in doubt, say Y.
config DEBUG_RODATA
bool "Make kernel text and rodata read-only"
@@ -56,7 +57,7 @@ config DEBUG_RODATA
is to help catch accidental or malicious attempts to change the
kernel's executable code.
If in doubt, say Y
If in doubt, say Y.
config DEBUG_ALIGN_RODATA
depends on DEBUG_RODATA
@@ -69,7 +70,7 @@ config DEBUG_ALIGN_RODATA
alignment and potentially wasted space. Turn on this option if
performance is more important than memory pressure.
If in doubt, say N
If in doubt, say N.
source "drivers/hwtracing/coresight/Kconfig"

4
arch/arm64/Makefile
View File

@@ -60,7 +60,9 @@ head-y := arch/arm64/kernel/head.o
# The byte offset of the kernel image in RAM from the start of RAM.
ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
else
TEXT_OFFSET := 0x00080000
endif

4
arch/arm64/include/asm/elf.h
View File

@@ -160,14 +160,14 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
#define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12))
#endif
#ifdef CONFIG_COMPAT
#ifdef __AARCH64EB__
#define COMPAT_ELF_PLATFORM ("v8b")
#else
#define COMPAT_ELF_PLATFORM ("v8l")
#endif
#ifdef CONFIG_COMPAT
#define COMPAT_ELF_ET_DYN_BASE (2 * TASK_SIZE_32 / 3)
/* AArch32 registers. */

3
arch/arm64/include/asm/memory.h
View File

@@ -55,8 +55,9 @@
#define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT))
/*
* PAGE_OFFSET - the virtual address of the start of the kernel image (top
* PAGE_OFFSET - the virtual address of the start of the linear map (top
* (VA_BITS - 1))
* KIMAGE_VADDR - the virtual address of the start of the kernel image
* VA_BITS - the maximum number of bits for virtual addresses.
* VA_START - the first kernel virtual address.
* TASK_SIZE - the maximum size of a user space task.

12
arch/arm64/include/asm/page.h
View File

@@ -23,16 +23,8 @@
/* PAGE_SHIFT determines the page size */
/* CONT_SHIFT determines the number of pages which can be tracked together */
#ifdef CONFIG_ARM64_64K_PAGES
#define PAGE_SHIFT 16
#define CONT_SHIFT 5
#elif defined(CONFIG_ARM64_16K_PAGES)
#define PAGE_SHIFT 14
#define CONT_SHIFT 7
#else
#define PAGE_SHIFT 12
#define CONT_SHIFT 4
#endif
#define PAGE_SHIFT CONFIG_ARM64_PAGE_SHIFT
#define CONT_SHIFT CONFIG_ARM64_CONT_SHIFT
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))

13
arch/arm64/include/asm/uaccess.h
View File

@@ -80,19 +80,6 @@ static inline void set_fs(mm_segment_t fs)
#define segment_eq(a, b) ((a) == (b))
/*
* Return 1 if addr < current->addr_limit, 0 otherwise.
*/
#define __addr_ok(addr) \
({ \
unsigned long flag; \
asm("cmp %1, %0; cset %0, lo" \
: "=&r" (flag) \
: "r" (addr), "0" (current_thread_info()->addr_limit) \
: "cc"); \
flag; \
})
/*
* Test whether a block of memory is a valid user space address.
* Returns 1 if the range is valid, 0 otherwise.

2
arch/arm64/include/asm/unistd.h
View File

@@ -44,7 +44,7 @@
#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE+2)
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE+5)
#define __NR_compat_syscalls 390
#define __NR_compat_syscalls 394
#endif
#define __ARCH_WANT_SYS_CLONE

8
arch/arm64/include/asm/unistd32.h
View File

@@ -801,6 +801,14 @@ __SYSCALL(__NR_execveat, compat_sys_execveat)
__SYSCALL(__NR_userfaultfd, sys_userfaultfd)
#define __NR_membarrier 389
__SYSCALL(__NR_membarrier, sys_membarrier)
#define __NR_mlock2 390
__SYSCALL(__NR_mlock2, sys_mlock2)
#define __NR_copy_file_range 391
__SYSCALL(__NR_copy_file_range, sys_copy_file_range)
#define __NR_preadv2 392
__SYSCALL(__NR_preadv2, compat_sys_preadv2)
#define __NR_pwritev2 393
__SYSCALL(__NR_pwritev2, compat_sys_pwritev2)
/*
* Please add new compat syscalls above this comment and update

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