linux/arch
Roland McGrath 4ba51fd75c x86 ptrace: avoid unnecessary wrmsr
This avoids using wrmsr on MSR_IA32_DEBUGCTLMSR when it's not needed.
No wrmsr ever needs to be done if noone has ever used block stepping.

Without this change, using ptrace on 2.6.25 on an x86 KVM guest
will tickle KVM's missing support for the MSR and crash the guest
kernel.  Though host KVM is the buggy one, this makes for a regression
in the guest behavior from 2.6.24->2.6.25 that we can easily avoid.

I also corrected some bad whitespace.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-03 15:42:43 -07:00
..
alpha alpha: fix ALSA DMA mmap crash 2008-04-02 15:28:19 -07:00
arm [ARM] 4873/1: Fix ITE 8152 interrupt demux 2008-03-28 15:07:46 +00:00
avr32 avr32: Fix bug in early resource allocation code 2008-03-27 15:31:57 +01:00
blackfin [Blackfin] arch: fix atomic and32/xor32 comments and ENDPROC markings 2008-03-03 17:44:14 -07:00
cris cris: correct usage of __user for copy to and from user space in lib/usercopy and uaccess.h 2008-03-04 16:35:16 -08:00
frv FRV: Change the timerfd syscalls to be the same as i386 2008-02-20 19:58:16 -08:00
h8300 h8300: defconfig update 2008-02-23 17:12:16 -08:00
ia64 [IA64] kprobes arch consolidation build fix 2008-03-06 09:49:01 -08:00
m32r ide: introduce HAVE_IDE 2008-02-09 10:46:40 +01:00
m68k m68k{,nommu}: Wire up new timerfd syscalls 2008-03-04 08:04:11 -08:00
m68knommu m68k{,nommu}: Wire up new timerfd syscalls 2008-03-04 08:04:11 -08:00
mips [MIPS] XSS1500: Fix compilation 2008-04-01 15:46:34 +01:00
mn10300 MN10300: define HZ as a config option 2008-02-23 17:12:13 -08:00
parisc [PARISC] head.S: section mismatch fixes 2008-03-15 19:12:22 -07:00
powerpc [POWERPC] Fix MPC5200 (not B!) device tree so FEC ethernet works 2008-04-03 22:11:12 +11:00
ppc [PPC] 8xx: swap bug-fix 2008-03-07 16:56:54 -06:00
s390 [S390] futex: let futex_atomic_cmpxchg_pt survive early functional tests. 2008-03-20 17:33:46 +01:00
sh sh: Fix up uImage compression type 2008-03-31 16:17:11 +09:00
sparc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-03-17 23:44:31 -07:00
sparc64 sparc64: remove unused calc_npages() in iommu_common.h 2008-03-28 15:56:01 -07:00
um [UML]: uml-net: don't set IFF_ALLMULTI in set_multicast_list 2008-03-26 00:16:29 -07:00
v850 ide: introduce HAVE_IDE 2008-02-09 10:46:40 +01:00
x86 x86 ptrace: avoid unnecessary wrmsr 2008-04-03 15:42:43 -07:00
xtensa [XTENSA] Allow debugger to modify the WINDOWBASE register. 2008-02-13 17:45:36 -08:00
.gitignore
Kconfig Kprobes: indicate kretprobe support in Kconfig 2008-03-04 16:35:11 -08:00