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Michael Ellerman 68fc378ce3 Revert "powerpc/tm: Abort syscalls in active transactions" 
This reverts commit feba40362b.

Although the principle of this change is good, the implementation has a
few issues.

Firstly we can sometimes fail to abort a syscall because r12 may have
been clobbered by C code if we went down the virtual CPU accounting
path, or if syscall tracing was enabled.

Secondly we have decided that it is safer to abort the syscall even
earlier in the syscall entry path, so that we avoid the syscall tracing
path when we are transactional.

So that we have time to thoroughly test those changes we have decided to
revert this for this merge window and will merge the fixed version in
the next window.

NB. Rather than reverting the selftest we just drop tm-syscall from
TEST_PROGS so that it's not run by default.

Fixes: feba40362b ("powerpc/tm: Abort syscalls in active transactions")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
History 2015-04-30 15:24:58 +10:00
..
00-INDEX cxl: Add documentation for userspace APIs 2014-10-08 20:16:19 +11:00
bootwrapper.txt powerpc/bootwrapper: Add documentation of boot wrapper targets 2008-07-04 00:59:03 -06:00
cpu_families.txt powerpc: Add cpu family documentation 2014-06-05 13:20:01 +10:00
cpu_features.txt Documentation/powerpc: Fix path to the powerpc directory 2013-01-10 17:01:50 +11:00
cxl.txt cxl: Add documentation for userspace APIs 2014-10-08 20:16:19 +11:00
eeh-pci-error-recovery.txt powerpc: Move include files to arch/powerpc/include/asm 2008-08-04 12:02:00 +10:00
firmware-assisted-dump.txt fadump: Add documentation for firmware-assisted dump. 2012-02-23 10:50:00 +11:00
hvcs.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
mpc52xx.txt Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup 2012-03-18 23:59:34 +01:00
pci_iov_resource_on_powernv.txt powerpc/pci: Add PCI resource alignment documentation 2015-03-31 13:02:38 +11:00
pmu-ebb.txt powerpc/perf: Core EBB support for 64-bit book3s 2013-07-01 11:50:10 +10:00
ptrace.txt powerpc/ptrace: Add DAWR debug feature info for userspace 2013-04-18 15:59:55 +10:00
qe_firmware.txt trivial: Miscellaneous documentation typo fixes 2009-06-12 18:01:47 +02:00
transactional_memory.txt Revert "powerpc/tm: Abort syscalls in active transactions" 2015-04-30 15:24:58 +10:00