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| author | Oleg Nesterov <oleg@redhat.com> | 2012-08-19 16:15:09 +0200 |
|---|---|---|
| committer | Anton Arapov <anton@redhat.com> | 2012-10-29 11:23:40 +0100 |
| commit | 44e75e212af2ed3faf1d91dd924ee883bc173205 (patch) | |
| tree | 65de1ee4fb3589df24329290eede7edb844e68f0 /include/linux/sched.h | |
| parent | ba6330ed721ae4bb4aedad5bedcf52e1c751f758 (diff) | |
| download | kernel-uprobes-44e75e212af2ed3faf1d91dd924ee883bc173205.tar.gz kernel-uprobes-44e75e212af2ed3faf1d91dd924ee883bc173205.tar.xz kernel-uprobes-44e75e212af2ed3faf1d91dd924ee883bc173205.zip | |
uprobes: Introduce MMF_RECALC_UPROBES
Add the new MMF_RECALC_UPROBES flag, it means that MMF_HAS_UPROBES
can be false positive after remove_breakpoint() or uprobe_munmap().
It is also set by uprobe_dup_mmap(), this is not optimal but simple.
We could add the new hook, uprobe_dup_vma(), to set MMF_HAS_UPROBES
only if the new mm actually has uprobes, but I don't think this
makes sense.
The next patch will use this flag to clear MMF_HAS_UPROBES.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index adae87fd7f5..ba300be400f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -446,7 +446,8 @@ extern int get_dumpable(struct mm_struct *mm); #define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */ #define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */ -#define MMF_HAS_UPROBES 19 /* might have uprobes */ +#define MMF_HAS_UPROBES 19 /* has uprobes */ +#define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */ #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK) |