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| author | Johannes Berg <johannes.berg@intel.com> | 2021-02-05 03:32:28 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-05 20:03:47 +0100 |
| commit | 55b6f763d8bcb5546997933105d66d3e6b080e6a (patch) | |
| tree | 2f432429dce1cf4b659426112db5f2bbd3ca71f1 /kernel/gcov | |
| parent | mm/vmalloc: separate put pages and flush VM flags (diff) | |
| download | linux-55b6f763d8bcb5546997933105d66d3e6b080e6a.tar.xz linux-55b6f763d8bcb5546997933105d66d3e6b080e6a.zip | |
init/gcov: allow CONFIG_CONSTRUCTORS on UML to fix module gcov
On ARCH=um, loading a module doesn't result in its constructors getting
called, which breaks module gcov since the debugfs files are never
registered. On the other hand, in-kernel constructors have already been
called by the dynamic linker, so we can't call them again.
Get out of this conundrum by allowing CONFIG_CONSTRUCTORS to be
selected, but avoiding the in-kernel constructor calls.
Also remove the "if !UML" from GCOV selecting CONSTRUCTORS now, since we
really do want CONSTRUCTORS, just not kernel binary ones.
Link: https://lkml.kernel.org/r/20210120172041.c246a2cac2fb.I1358f584b76f1898373adfed77f4462c8705b736@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/gcov')
| -rw-r--r-- | kernel/gcov/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig index 3110c77230c7..f62de2dea8a3 100644 --- a/kernel/gcov/Kconfig +++ b/kernel/gcov/Kconfig @@ -4,7 +4,7 @@ menu "GCOV-based kernel profiling" config GCOV_KERNEL bool "Enable gcov-based kernel profiling" depends on DEBUG_FS - select CONSTRUCTORS if !UML + select CONSTRUCTORS default n help This option enables gcov-based code profiling (e.g. for code coverage |