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David S. Miller e88d246871 sparc: Stash orig_i0 into %g6 instead of %g2 
As per the comments added by this commit, %g2 turns out to not be a
usable place to save away orig_i0 for syscall restart handling.

In fact all of %g2, %g3, %g4, and %g5 are assumed to be saved across
a system call by various bits of code in glibc.

%g1 can't be used because that holds the syscall number, which would
need to be saved and restored for syscall restart handling too, and
that would only compound our problems :-)

This leaves us with %g6 and %g7 which are for "system use".  %g7 is
used as the "thread register" by glibc, but %g6 is used as a compiler
and assembler temporary scratch register.  And in no instance is %g6
used to hold a value across a system call.

Therefore %g6 is safe for storing away orig_i0, at least for now.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-15 12:57:00 -08:00
..
.gitignore
apc.c sparc: Add module.h to files previously implicitly using it. 2011-10-31 19:30:54 -04:00
asm-offsets.c
audit.c
auxio_32.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
auxio_64.c sparc64: Fix section mis-match errors. 2011-03-30 17:37:56 -07:00
btext.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
central.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
cherrs.S
chmc.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
compat_audit.c
cpu.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
cpumap.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
cpumap.h
devices.c sparc32: always register a PROM based early console 2011-04-21 15:47:35 -07:00
dma.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
ds.c sparc: Don't do hypervisor calls on non-sun4v in DS driver. 2011-08-11 17:58:59 -07:00
dtlb_miss.S
dtlb_prot.S
ebus.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
entry.h sparc: Use popc when possible for ffs/__ffs/ffz. 2011-08-02 21:28:53 -07:00
entry.S sparc: sun4m SMP: fix wrong shift instruction in IPI handler 2011-07-16 10:45:12 -07:00
etrap_32.S
etrap_64.S
fpu_traps.S
ftrace.c sparc64: Add function graph tracer support. 2010-04-12 22:37:26 -07:00
getsetcc.S
head_32.S sparc32,leon: operate on boot-cpu IRQ controller registers 2011-04-21 16:44:45 -07:00
head_64.S sparc64: Future proof Niagara cpu detection. 2011-09-16 14:21:33 -07:00
helpers.S sparc64: Fix perf_arch_get_caller_regs(). 2010-08-08 22:07:36 -07:00
hvapi.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
hvcalls.S sparc: Set reboot-cmd using reboot data hypervisor call if available. 2011-08-02 21:28:52 -07:00
hvtramp.S
idprom.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
init_task.c Fix common misspellings 2011-03-31 11:26:23 -03:00
iommu.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
iommu_common.h
ioport.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2011-07-31 14:30:59 -10:00
irq.h sparc32,sun4d: Change IPI IRQ level to prevent collision between IPI and timer interrupt 2011-08-29 09:20:40 -07:00
irq_32.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
irq_64.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
itlb_miss.S
ivec.S
jump_label.c sparc/jump_label: drop arch_jump_label_text_poke_early() 2011-10-25 11:54:26 -07:00
kernel.h sparc: Set reboot-cmd using reboot data hypervisor call if available. 2011-08-02 21:28:52 -07:00
kgdb_32.c kgdb,sparc: Add in kgdb_arch_set_pc for sparc 2010-05-20 21:04:19 -05:00
kgdb_64.c kgdb,sparc: Add in kgdb_arch_set_pc for sparc 2010-05-20 21:04:19 -05:00
kprobes.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
kstack.h sparc64: Run NMIs on the hardirq stack. 2010-04-14 02:04:29 -07:00
ktlb.S sparc: Access kernel TSB using physical addressing when possible. 2011-08-05 00:53:57 -07:00
ldc.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
led.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
leon_kernel.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
leon_pci.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
leon_pci_grpci2.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
leon_pmc.c SPARC/LEON: power down instruction different of different LEONs 2011-03-16 18:19:04 -07:00
leon_smp.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
Makefile sparc: Allow handling signals when stack is corrupted. 2011-08-20 17:14:54 -07:00
mdesc.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
misctrap.S
module.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
muldiv.c
nmi.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
of_device_32.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
of_device_64.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
of_device_common.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
of_device_common.h
pci.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
pci_common.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
pci_fire.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
pci_impl.h sparc64: rename virt_irq => irq - II 2011-03-16 18:19:03 -07:00
pci_msi.c sparc: convert old cpumask API into new one 2011-05-16 13:38:07 -07:00
pci_psycho.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
pci_sabre.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
pci_schizo.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
pci_sun4v.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
pci_sun4v.h
pci_sun4v_asm.S
pcic.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
pcr.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
perf_event.c sparc: Detect and handle UltraSPARC-T3 cpu types. 2011-07-27 22:10:10 -07:00
pmc.c sparc: Add module.h to files previously implicitly using it. 2011-10-31 19:30:54 -04:00
power.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
process_32.c sparc, exec: remove redundant addr_limit assignment 2011-09-20 23:12:42 -07:00
process_64.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
prom.h of/promtree: make drivers/of/pdt.c no longer sparc-only 2010-10-10 21:53:30 -06:00
prom_32.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
prom_64.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
prom_common.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
prom_irqtrans.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
psycho_common.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
psycho_common.h sparc: remove references to of_device and to_of_device 2010-07-24 09:58:22 -06:00
ptrace_32.c ptrace: cleanup arch_ptrace() on sparc 2010-10-27 18:03:12 -07:00
ptrace_64.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
reboot.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
rtrap_32.S sparc: keep calling do_signal() as long as pending signals remain 2010-10-26 08:59:55 -07:00
rtrap_64.S sparc: keep calling do_signal() as long as pending signals remain 2010-10-26 08:59:55 -07:00
sbus.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
setup_32.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
setup_64.c sparc: Make '-p' boot option meaningful again. 2011-09-21 12:48:06 -07:00
signal32.c sparc: Stash orig_i0 into %g6 instead of %g2 2011-11-15 12:57:00 -08:00
signal_32.c sparc: Stash orig_i0 into %g6 instead of %g2 2011-11-15 12:57:00 -08:00
signal_64.c sparc: Stash orig_i0 into %g6 instead of %g2 2011-11-15 12:57:00 -08:00
sigutil.h sparc: Allow handling signals when stack is corrupted. 2011-08-20 17:14:54 -07:00
sigutil_32.c sparc: Allow handling signals when stack is corrupted. 2011-08-20 17:14:54 -07:00
sigutil_64.c sparc: sigutil: Include <linux/errno.h> 2011-11-13 20:53:25 -08:00
smp_32.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
smp_64.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
sparc_ksyms_32.c
sparc_ksyms_64.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
spiterrs.S
sstate.c sparc: Set reboot-cmd using reboot data hypervisor call if available. 2011-08-02 21:28:52 -07:00
stacktrace.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
starfire.c sparc: explicitly cast negative phandle checks to s32 2011-01-03 20:02:06 -07:00
sun4c_irq.c sparc32: genirq support 2011-04-19 22:11:40 -07:00
sun4d_irq.c Add support for allocating irqs for bootbus devices 2011-06-07 16:06:33 -07:00
sun4d_smp.c sparc: convert old cpumask API into new one 2011-05-16 13:38:07 -07:00
sun4m_irq.c sparc32: genirq support 2011-04-19 22:11:40 -07:00
sun4m_smp.c sparc: convert old cpumask API into new one 2011-05-16 13:38:07 -07:00
sun4v_ivec.S
sun4v_tlb_miss.S
sys32.S All Arch: remove linkage for sys_nfsservctl system call 2011-08-26 15:09:58 -07:00
sys_sparc32.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
sys_sparc_32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
sys_sparc_64.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
syscalls.S sparc64: Kill off old sys_perfctr system call and state. 2010-03-03 08:08:49 -08:00
sysfs.c sparc: convert old cpumask API into new one 2011-05-16 13:38:07 -07:00
systbls.h improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
systbls_32.S sparc: Hook up process_vm_{readv,writev} syscalls. 2011-11-01 00:51:30 -07:00
systbls_64.S sparc: Hook up process_vm_{readv,writev} syscalls. 2011-11-01 00:51:30 -07:00
tadpole.c of/sparc: convert various prom_* functions to use phandle 2010-10-09 02:33:34 -06:00
time_32.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 2011-05-20 12:59:54 -07:00
time_64.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
trampoline_32.S
trampoline_64.S
traps_32.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
traps_64.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
tsb.S sparc64: Fix sun4u execute bit check in TSB I-TLB load. 2010-02-19 15:19:52 -08:00
ttable.S sparc64: fix the build error due to smp_kgdb_capture_client() 2010-06-25 11:17:57 -07:00
una_asm_32.S sparc32: unaligned memory access (MNA) trap handler bug 2011-02-01 12:39:59 -08:00
una_asm_64.S sparc: Fix .size directive for do_int_load 2011-03-16 18:19:15 -07:00
unaligned_32.c sparc: remove several unnecessary module.h include instances 2011-10-31 19:30:54 -04:00
unaligned_64.c sparc: Use hweight64() in popc emulation. 2011-08-02 21:28:50 -07:00
us2e_cpufreq.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
us3_cpufreq.c sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
utrap.S
vio.c sparc: add export.h to arch/sparc files as required 2011-10-31 19:30:52 -04:00
viohs.c sparc: move symbol exporters to use export.h not module.h 2011-10-31 19:30:53 -04:00
visemul.c sparc64: Fix masking and shifting in VIS fpcmp emulation. 2011-10-31 01:05:49 -07:00
vmlinux.lds.S sparc: Access kernel TSB using physical addressing when possible. 2011-08-05 00:53:57 -07:00
windows.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
winfixup.S
wof.S
wuf.S