diff options
| author | Joel Fernandes <joelaf@google.com> | 2016-10-20 00:34:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-11 09:30:08 -0700 |
| commit | 2d0abb7b0debd522a0752571be1e820f45333d83 (patch) | |
| tree | 21c74a438f0cea37e319169d559be8fc5ff1aee6 /include | |
| parent | c64a196b2b667555af9231dae4e63af6590ed2c7 (diff) | |
pstore: Make spinlock per zone instead of global
commit 109704492ef637956265ec2eb72ae7b3b39eb6f4 upstream.
Currently pstore has a global spinlock for all zones. Since the zones
are independent and modify different areas of memory, there's no need
to have a global lock, so we should use a per-zone lock as introduced
here. Also, when ramoops's ftrace use-case has a FTRACE_PER_CPU flag
introduced later, which splits the ftrace memory area into a single zone
per CPU, it will eliminate the need for locking. In preparation for this,
make the locking optional.
Signed-off-by: Joel Fernandes <joelaf@google.com>
[kees: updated commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pstore_ram.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index 4af3fdc85b01..4bfcd43eb55a 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -39,6 +39,7 @@ struct persistent_ram_zone { void *vaddr; struct persistent_ram_buffer *buffer; size_t buffer_size; + raw_spinlock_t buffer_lock; /* ECC correction */ char *par_buffer; |