From: Davidlohr Bueso <d...@stgolabs.net> This series is the first in a few where I'm planning on removing the mmap_sem need for exe_file serialization. This is absurd and needs to have its own locking. Anyway, this is the final goal, and this series is just the first of a few that deals with unifying users of exe_file.
For now we only deal with audit and tomoyo, the most obvious naughty users, which only take the mmap_sem for exe_file. Over the years, relying on the mmap_sem for exe_file has made some callers increasingly messy and it is not as straightforward. Essentially, we want to convert: down_read(&mm->mmap_sem); do_something_with(mm->exe_file); up_read(&mm->mmap_sem); to: exe_file = get_mm_exe_file(mm); <--- mmap_sem is only held here. do_something_with(mm->exe_file); fput(exe_file); On its own, these patches already have value in that we reduce mmap_sem hold times and critical region. Once all users are standardized, converting the lock rules will be much easier. Thanks! Davidlohr Bueso (3): kernel/audit: consolidate handling of mm->exe_file kernel/audit: robustify handling of mm->exe_file security/tomoyo: robustify handling of mm->exe_file kernel/audit.c | 9 +-------- kernel/audit.h | 20 ++++++++++++++++++++ kernel/auditsc.c | 9 +-------- security/tomoyo/common.c | 41 ++++++++++++++++++++++++++++++++++++++--- security/tomoyo/common.h | 1 - security/tomoyo/util.c | 22 ---------------------- 6 files changed, 60 insertions(+), 42 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
