diff options
| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2011-05-23 04:24:31 -0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-05-23 04:24:29 -0400 |
| commit | add7490c273650c3aa8012f3e082aa64af86f17c (patch) | |
| tree | 80dbc7913434d8b56235f1f0fc4e172152fa13b0 /arch/s390/kernel/vdso64/Makefile | |
| parent | cf2d007bd43bc254d5254fe9d30af3e73ed5b98a (diff) | |
[S390] vdso: disable gcov profiling
The concepts of VDSO and gcov-based profiling don't mix: the former
includes kernel-provided code running in userspace, the latter adds
instructions that modify counters in kernel data segments. On s390
this has not been a problem so far due to VDSO code being written in
all-assembler which is exempt from gcov-based profiling. This could
change in the future, so disable profiling excplicitly for VDSO code.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vdso64/Makefile')
| -rw-r--r-- | arch/s390/kernel/vdso64/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile index 449352dda9cd..2a8ddfd12a5b 100644 --- a/arch/s390/kernel/vdso64/Makefile +++ b/arch/s390/kernel/vdso64/Makefile | |||
| @@ -22,6 +22,9 @@ obj-y += vdso64_wrapper.o | |||
| 22 | extra-y += vdso64.lds | 22 | extra-y += vdso64.lds |
| 23 | CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) | 23 | CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) |
| 24 | 24 | ||
| 25 | # Disable gcov profiling for VDSO code | ||
| 26 | GCOV_PROFILE := n | ||
| 27 | |||
| 25 | # Force dependency (incbin is bad) | 28 | # Force dependency (incbin is bad) |
| 26 | $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so | 29 | $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so |
| 27 | 30 | ||