#ifndef __TOOLS_LINUX_SPARC64_BARRIER_H
#define __TOOLS_LINUX_SPARC64_BARRIER_H
/* Copied from the kernel sources to tools/:
*
* These are here in an effort to more fully work around Spitfire Errata
* #51. Essentially, if a memory barrier occurs soon after a mispredicted
* branch, the chip can stop executing instructions until a trap occurs.
* Therefore, if interrupts are disabled, the chip can hang forever.
*
* It used to be believed that the memory barrier had to be right in the
* delay slot, but a case has been traced recently wherein the memory barrier
* was one instruction after the branch delay slot and the chip still hung.
* The offending sequence was the following in sym_wakeup_done() of the
* sym53c8xx_2 driver:
*
* call sym_ccb_from_dsa, 0
* movge %icc, 0, %l0
* brz,pn %o0, .LL1303
* mov %o0, %l2
* membar #LoadLoad
*
* The branch has to be mispredicted for the bug to occur. Therefore, we put
* the memory barrier explicitly into a "branch always, predicted taken"
* delay slot to avoid the problem case.
*/
#define membar_safe(type) \
do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
" membar " type "\n" \
"1:\n" \
: : : "memory"); \
} while (0)
/* The kernel always executes in TSO memory model these days,
* and furthermore most sparc64 chips implement more stringent
* memory ordering than required by the specifications.
*/
#define mb() membar_safe("#StoreLoad")
#define rmb() __asm__ __volatile__("":::"memory")
#define wmb() __asm__ __volatile__("":::"memory")
#endif /* !(__TOOLS_LINUX_SPARC64_BARRIER_H) */
s/?id=e3818697e1d9140d0b990fecf4429d40c41ca0b5'>refslogtreecommitdiff|
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Merge tag 'usb-4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a bunch of USB fixes for 4.10-rc3. Yeah, it's a lot, an
artifact of the holiday break I think.
Lots of gadget and the usual XHCI fixups for reported issues (one day
that driver will calm down...) Also included are a bunch of usb-serial
driver fixes, and for good measure, a number of much-reported MUSB
driver issues have finally been resolved.
All of these have been in linux-next with no reported issues"
* tag 'usb-4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (72 commits)
USB: fix problems with duplicate endpoint addresses
usb: ohci-at91: use descriptor-based gpio APIs correctly
usb: storage: unusual_uas: Add JMicron JMS56x to unusual device
usb: hub: Move hub_port_disable() to fix warning if PM is disabled
usb: musb: blackfin: add bfin_fifo_offset in bfin_ops
usb: musb: fix compilation warning on unused function
usb: musb: Fix trying to free already-free IRQ 4
usb: musb: dsps: implement clear_ep_rxintr() callback
usb: musb: core: add clear_ep_rxintr() to musb_platform_ops
USB: serial: ti_usb_3410_5052: fix NULL-deref at open
USB: serial: spcp8x5: fix NULL-deref at open
USB: serial: quatech2: fix sleep-while-atomic in close
USB: serial: pl2303: fix NULL-deref at open
USB: serial: oti6858: fix NULL-deref at open
USB: serial: omninet: fix NULL-derefs at open and disconnect
USB: serial: mos7840: fix misleading interrupt-URB comment
USB: serial: mos7840: remove unused write URB
USB: serial: mos7840: fix NULL-deref at open
USB: serial: mos7720: remove obsolete port initialisation
USB: serial: mos7720: fix parallel probe
...