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authorLi Zhong <zhong@linux.vnet.ibm.com>2012-01-07 17:54:52 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-01-11 12:50:26 +1100
commitebb7f616abf6ee11603e6b63aa6c5f84c80a17d0 (patch)
tree8912e1ebd7d665286e7bc28ec30688517835da87 /tools
parenta5ccfee05a439b803640e94584056204501db31c (diff)
downloadlinux-linaro-stable-ebb7f616abf6ee11603e6b63aa6c5f84c80a17d0.tar.gz
powerpc: Fix unpaired __trace_hcall_entry and __trace_hcall_exit
Unpaired calling of __trace_hcall_entry and __trace_hcall_exit could cause incorrect preempt count. And it might happen as the global variable hcall_tracepoint_refcount is checked separately before calling them. Instead, store the value that was used on entry in the stack frame and retreive it from there after the call Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'tools')
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