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kernel-49/arch/mips/lib/mips-atomic.c
Greg Kroah-Hartman 561daa5ddc Merge 4.9.273 into android-4.9-q
Changes in 4.9.273
	proc: Track /proc/$pid/attr/ opener mm_struct
	net/nfc/rawsock.c: fix a permission check bug
	ASoC: sti-sas: add missing MODULE_DEVICE_TABLE
	isdn: mISDN: netjet: Fix crash in nj_probe:
	bonding: init notify_work earlier to avoid uninitialized use
	netlink: disable IRQs for netlink_lock_table()
	net: mdiobus: get rid of a BUG_ON()
	cgroup: disable controllers at parse time
	wq: handle VM suspension in stall detection
	net/qla3xxx: fix schedule while atomic in ql_sem_spinlock
	scsi: vmw_pvscsi: Set correct residual data length
	scsi: target: qla2xxx: Wait for stop_phase1 at WWN removal
	net: macb: ensure the device is available before accessing GEMGXL control registers
	net: appletalk: cops: Fix data race in cops_probe1
	MIPS: Fix kernel hang under FUNCTION_GRAPH_TRACER and PREEMPT_TRACER
	bnx2x: Fix missing error code in bnx2x_iov_init_one()
	powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers
	powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers
	i2c: mpc: Make use of i2c_recover_bus()
	i2c: mpc: implement erratum A-004447 workaround
	drm: Lock pointer access in drm_master_release()
	kvm: avoid speculation-based attacks from out-of-range memslot accesses
	btrfs: return value from btrfs_mark_extent_written() in case of error
	cgroup1: don't allow '\n' in renaming
	USB: f_ncm: ncm_bitrate (speed) is unsigned
	usb: dwc3: ep0: fix NULL pointer exception
	USB: serial: ftdi_sio: add NovaTech OrionMX product ID
	USB: serial: omninet: add device id for Zyxel Omni 56K Plus
	USB: serial: quatech2: fix control-request directions
	usb: gadget: eem: fix wrong eem header operation
	usb: fix various gadgets null ptr deref on 10gbps cabling.
	usb: fix various gadget panics on 10gbps cabling
	perf: Fix data race between pin_count increment/decrement
	NFS: Fix a potential NULL dereference in nfs_get_client()
	perf session: Correct buffer copying when peeking events
	kvm: fix previous commit for 32-bit builds
	NFSv4: nfs4_proc_set_acl needs to restore NFS_CAP_UIDGID_NOMAP on error.
	scsi: core: Fix error handling of scsi_host_alloc()
	scsi: core: Only put parent device if host state differs from SHOST_CREATED
	ftrace: Do not blindly read the ip address in ftrace_bug()
	tracing: Correct the length check which causes memory corruption
	proc: only require mm_struct for writing
	Linux 4.9.273

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ifaa5fba5937bfae50d21fdb2ad6bd94839fbb981
2021-06-17 12:41:56 +03:00

114 lines
2.8 KiB
C

/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2003 by Ralf Baechle
* Copyright (C) 1996 by Paul M. Antoine
* Copyright (C) 1999 Silicon Graphics
* Copyright (C) 2000 MIPS Technologies, Inc.
*/
#include <asm/irqflags.h>
#include <asm/hazards.h>
#include <linux/compiler.h>
#include <linux/preempt.h>
#include <linux/export.h>
#include <linux/stringify.h>
#if !defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_CPU_MIPSR6)
/*
* For cli() we have to insert nops to make sure that the new value
* has actually arrived in the status register before the end of this
* macro.
* R4000/R4400 need three nops, the R4600 two nops and the R10000 needs
* no nops at all.
*/
/*
* For TX49, operating only IE bit is not enough.
*
* If mfc0 $12 follows store and the mfc0 is last instruction of a
* page and fetching the next instruction causes TLB miss, the result
* of the mfc0 might wrongly contain EXL bit.
*
* ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008
*
* Workaround: mask EXL bit of the result or place a nop before mfc0.
*/
notrace void arch_local_irq_disable(void)
{
preempt_disable_notrace();
__asm__ __volatile__(
" .set push \n"
" .set noat \n"
" mfc0 $1,$12 \n"
" ori $1,0x1f \n"
" xori $1,0x1f \n"
" .set noreorder \n"
" mtc0 $1,$12 \n"
" " __stringify(__irq_disable_hazard) " \n"
" .set pop \n"
: /* no outputs */
: /* no inputs */
: "memory");
preempt_enable_notrace();
}
EXPORT_SYMBOL(arch_local_irq_disable);
notrace unsigned long arch_local_irq_save(void)
{
unsigned long flags;
preempt_disable_notrace();
__asm__ __volatile__(
" .set push \n"
" .set reorder \n"
" .set noat \n"
" mfc0 %[flags], $12 \n"
" ori $1, %[flags], 0x1f \n"
" xori $1, 0x1f \n"
" .set noreorder \n"
" mtc0 $1, $12 \n"
" " __stringify(__irq_disable_hazard) " \n"
" .set pop \n"
: [flags] "=r" (flags)
: /* no inputs */
: "memory");
preempt_enable_notrace();
return flags;
}
EXPORT_SYMBOL(arch_local_irq_save);
notrace void arch_local_irq_restore(unsigned long flags)
{
unsigned long __tmp1;
preempt_disable_notrace();
__asm__ __volatile__(
" .set push \n"
" .set noreorder \n"
" .set noat \n"
" mfc0 $1, $12 \n"
" andi %[flags], 1 \n"
" ori $1, 0x1f \n"
" xori $1, 0x1f \n"
" or %[flags], $1 \n"
" mtc0 %[flags], $12 \n"
" " __stringify(__irq_disable_hazard) " \n"
" .set pop \n"
: [flags] "=r" (__tmp1)
: "0" (flags)
: "memory");
preempt_enable_notrace();
}
EXPORT_SYMBOL(arch_local_irq_restore);
#endif /* !CONFIG_CPU_MIPSR2 && !CONFIG_CPU_MIPSR6 */