kevin/linux
1
Fork 0
Code
faa4602e47
linux/arch/x86/kernel
History
Peter Zijlstra faa4602e47 x86, perf, bts, mm: Delete the never used BTS-ptrace code 
Support for the PMU's BTS features has been upstreamed in
v2.6.32, but we still have the old and disabled ptrace-BTS,
as Linus noticed it not so long ago.

It's buggy: TIF_DEBUGCTLMSR is trampling all over that MSR without
regard for other uses (perf) and doesn't provide the flexibility
needed for perf either.

Its users are ptrace-block-step and ptrace-bts, since ptrace-bts
was never used and ptrace-block-step can be implemented using a
much simpler approach.

So axe all 3000 lines of it. That includes the *locked_memory*()
APIs in mm/mlock.c as well.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Markus Metzger <markus.t.metzger@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20100325135413.938004390@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-03-26 11:33:55 +01:00
..
acpi Merge branches 'battery-2.6.34', 'bugzilla-10805', 'bugzilla-14668', 'bugzilla-531916-power-state', 'ht-warn-2.6.34', 'pnp', 'processor-rename', 'sony-2.6.34', 'suse-bugzilla-531547', 'tz-check', 'video' and 'misc-2.6.34' into release 2010-03-14 21:30:17 -04:00
apic Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-03-13 14:45:49 -08:00
cpu x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
.gitignore
alternative.c
amd_iommu_init.c
amd_iommu.c
apb_timer.c Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-03-07 15:59:39 -08:00
aperture_64.c
apm_32.c
asm-offsets_32.c
asm-offsets_64.c
asm-offsets.c
audit_64.c
bios_uv.c
bootflag.c
check.c
cpuid.c
crash_dump_32.c
crash_dump_64.c
crash.c
doublefault_32.c
dumpstack_32.c
dumpstack_64.c perf/x86-64: Use frame pointer to walk on irq and process stacks 2010-03-10 14:26:40 +01:00
dumpstack.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
dumpstack.h perf: Introduce new perf_fetch_caller_regs() for hot regs snapshot 2010-03-10 14:39:35 +01:00
e820.c
early_printk.c
early-quirks.c
efi_32.c
efi_64.c
efi_stub_32.S
efi_stub_64.S
efi.c
entry_32.S
entry_64.S
ftrace.c
head32.c
head64.c
head_32.S
head_64.S
head.c
hpet.c
hw_breakpoint.c
i386_ksyms_32.c
i387.c
i8237.c
i8253.c
i8259.c
init_task.c
io_delay.c
ioport.c
irq_32.c
irq_64.c
irq.c
irqinit.c
k8.c x86, k8 nb: Fix boot crash: enable k8_northbridges unconditionally on AMD systems 2010-03-13 08:36:16 +01:00
kdebugfs.c
kgdb.c
kprobes.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
kvm.c
kvmclock.c
ldt.c
machine_kexec_32.c
machine_kexec_64.c
Makefile x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
mca_32.c
microcode_amd.c
microcode_core.c
microcode_intel.c
mmconf-fam10h_64.c
module.c
mpparse.c
mrst.c
msr.c
olpc.c
paravirt_patch_32.c
paravirt_patch_64.c
paravirt-spinlocks.c
paravirt.c
pci-calgary_64.c
pci-dma.c Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
pci-gart_64.c x86, k8 nb: Fix boot crash: enable k8_northbridges unconditionally on AMD systems 2010-03-13 08:36:16 +01:00
pci-nommu.c
pci-swiotlb.c
pcspeaker.c
pmtimer_64.c
probe_roms_32.c
process_32.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
process_64.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
process.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
ptrace.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
pvclock.c
quirks.c
reboot_fixups_32.c
reboot.c
relocate_kernel_32.S
relocate_kernel_64.S
rtc.c
scx200_32.c
setup_percpu.c
setup.c
sfi.c
signal.c
smp.c
smpboot.c Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-03-07 15:59:39 -08:00
stacktrace.c
step.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
sys_i386_32.c Add generic sys_olduname() 2010-03-12 15:52:32 -08:00
sys_x86_64.c improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
syscall_64.c
syscall_table_32.S Add generic sys_old_mmap() 2010-03-12 15:52:32 -08:00
tboot.c
tce_64.c
test_nx.c
test_rodata.c
time.c
tlb_uv.c
tls.c
tls.h
topology.c
trampoline_32.S
trampoline_64.S
trampoline.c
traps.c x86, perf, bts, mm: Delete the never used BTS-ptrace code 2010-03-26 11:33:55 +01:00
tsc_sync.c
tsc.c Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
uv_irq.c
uv_sysfs.c
uv_time.c
verify_cpu_64.S
visws_quirks.c
vm86_32.c
vmi_32.c
vmiclock_32.c Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
vmlinux.lds.S
vsmp_64.c
vsyscall_64.c
x86_init.c Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-03-07 15:59:39 -08:00
x8664_ksyms_64.c
xsave.c