diff options
| author | Joel Fernandes <joelaf@google.com> | 2016-10-20 00:34:00 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-08-20 13:21:03 +0200 |
| commit | 8359ab6e7071255e1fa3a364b2a6c729bd099827 (patch) | |
| tree | 7a09914c784e480bdde4cfad73c3b631ac894fdc /include/linux | |
| parent | 3d0e1aae087dcc05a746a1a7b5908331c28aa32c (diff) | |
pstore: Make spinlock per zone instead of global
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>
Signed-off-by: Joe Maples <joe@frap129.org>
Diffstat (limited to 'include/linux')
| -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 45ac5a0d2..0672dd049 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -40,6 +40,7 @@ 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; |