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9ce815ed50
linux/arch/tile/kernel
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Chris Metcalf 9ce815ed50 tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry 
This flag value is saved in ptregs and used to decide whether
to disable irqs when returning from the kernel.  Commit 1168df528fe4
("tile: don't assume user privilege is zero") performed a bad
merge from some KVM-enabled code that had not yet been upstreamed.

The only issue with the old code is that we will read the interrupt
mask in more conditions than we need to (e.g., coming from user
space when user space has the Interrupt Critical Section bit set, or
coming from a guest kernel), which is a slow multi-cycle operation.
This change saves those few cycles in the common case.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:26 -05:00
..
vdso tile/vdso: emit a GNU hash as well 2015-08-06 20:22:40 -04:00
asm-offsets.c tile: check for correct compiler earlier in asm-offsets.c 2013-09-03 14:53:09 -04:00
backtrace.c arch/tile: big-endian: properly bswap instruction bundles when backtracing 2012-06-18 13:11:21 -04:00
compat_signal.c signal: fix information leak in copy_siginfo_from_user32 2015-08-07 04:39:40 +03:00
compat.c tile: remove stray blank space 2013-09-16 15:47:32 -04:00
early_printk.c printk: remove used-once early_vprintk 2014-12-10 17:41:10 -08:00
entry.S tile: improve stack backtrace 2015-05-11 11:22:40 -04:00
ftrace.c tile/jump_label: add jump label support for TILE-Gx 2016-01-04 15:09:31 -05:00
hardwall.c tile: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:37 -08:00
head_32.S tile: parameterize VA and PA space more cleanly 2013-09-03 14:47:34 -04:00
head_64.S tile: parameterize VA and PA space more cleanly 2013-09-03 14:47:34 -04:00
hvglue_trace.c tile: support delivering NMIs for multicore backtrace 2015-05-11 11:22:31 -04:00
hvglue.S tile: support delivering NMIs for multicore backtrace 2015-05-11 11:22:31 -04:00
intvec_32.S arch/tile: adopt prepare_exit_to_usermode() model from x86 2016-01-18 14:49:09 -05:00
intvec_64.S tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry 2016-01-18 14:49:26 -05:00
irq.c tile: Use the more common pr_warn instead of pr_warning 2014-11-11 15:51:42 -05:00
jump_label.c tile/jump_label: add jump label support for TILE-Gx 2016-01-04 15:09:31 -05:00
kgdb.c tile: define a macro ktext_writable_addr to get writable kernel text address 2016-01-04 15:09:31 -05:00
kprobes.c tile: define a macro ktext_writable_addr to get writable kernel text address 2016-01-04 15:09:31 -05:00
machine_kexec.c tile: Use the more common pr_warn instead of pr_warning 2014-11-11 15:51:42 -05:00
Makefile tile/jump_label: add jump label support for TILE-Gx 2016-01-04 15:09:31 -05:00
mcount_64.S tile: ftrace: fix function_graph tracer issues 2015-04-17 14:01:38 -04:00
messaging.c tile: Use the more common pr_warn instead of pr_warning 2014-11-11 15:51:42 -05:00
module.c module: remove mod arg from module_free, rename module_memfree(). 2015-01-20 11:38:33 +10:30
pci_gx.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
pci-dma.c tile PCI RC: make default consistent DMA mask 32-bit 2013-09-03 14:53:37 -04:00
pci.c PCI: Assign resources before drivers claim devices (pci_scan_root_bus()) 2015-03-19 10:17:13 -05:00
perf_event.c treewide: Remove old email address 2015-11-23 09:44:58 +01:00
pmc.c tile: Add support for handling PMC hardware 2014-03-07 11:19:47 -05:00
proc.c tile: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:37 -08:00
process.c arch/tile: adopt prepare_exit_to_usermode() model from x86 2016-01-18 14:49:09 -05:00
ptrace.c tile: enable full SECCOMP support 2015-07-30 12:32:16 -04:00
reboot.c tile: various console improvements 2013-08-12 14:46:18 -04:00
regs_32.S tile: change <asm/system.h> to <asm/switch_to.h> in comments 2013-09-03 14:53:17 -04:00
regs_64.S tile: change <asm/system.h> to <asm/switch_to.h> in comments 2013-09-03 14:53:17 -04:00
relocate_kernel_32.S tile: remove support for TILE64 2013-09-03 14:53:29 -04:00
relocate_kernel_64.S tile: remove support for TILE64 2013-09-03 14:53:29 -04:00
setup.c tile: fix a -Wframe-larger-than warning 2016-01-18 14:49:19 -05:00
signal.c tile: Remove signal translation and exec_domain 2015-04-12 21:03:27 +02:00
single_step.c tile: support CONTEXT_TRACKING and thus NOHZ_FULL 2015-04-17 14:01:10 -04:00
smp.c tile: support arch_irq_work_raise 2015-04-17 12:58:44 -04:00
smpboot.c tile: Use the more common pr_warn instead of pr_warning 2014-11-11 15:51:42 -05:00
stack.c tile: include the syscall number in the backtrace 2016-01-18 14:49:16 -05:00
sys.c tile: support CONFIG_PREEMPT 2013-08-13 16:26:01 -04:00
sysfs.c bus: subsys: update return type of ->remove_dev() to void 2015-08-05 17:08:14 -07:00
tile-desc_32.c arch/tile: factor out <arch/opcode.h> header 2011-11-03 16:58:54 -04:00
tile-desc_64.c arch/tile: factor out <arch/opcode.h> header 2011-11-03 16:58:54 -04:00
time.c tile/time: Migrate to new 'set-state' interface 2015-07-30 12:32:15 -04:00
tlb.c tile: do less L1 I-cache eviction 2013-08-30 11:56:34 -04:00
traps.c tile: improve stack backtrace 2015-05-11 11:22:40 -04:00
unaligned.c tile: support CONTEXT_TRACKING and thus NOHZ_FULL 2015-04-17 14:01:10 -04:00
usb.c tile: fix build failure 2015-09-28 11:23:39 -04:00
vdso.c arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
vmlinux.lds.S tile: Remove tile-specific _sinitdata and _einitdata 2014-10-02 10:19:33 -04:00