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| author |   Joel Fernandes <joelaf@google.com> | 2016-10-20 00:34:00 -0700 |
|---|---|---|
| committer |   Kees Cook <keescook@chromium.org> | 2016-11-11 10:35:37 -0800 |
| commit | 109704492ef637956265ec2eb72ae7b3b39eb6f4 (patch) | |
| tree | 8faf79b5252f5c7b14ce25d58c2d758b83ed7970 /include/linux/pstore_ram.h | |
| parent | pstore: Actually give up during locking failure (diff) | |
| download | linux-dev-109704492ef637956265ec2eb72ae7b3b39eb6f4.tar.xz linux-dev-109704492ef637956265ec2eb72ae7b3b39eb6f4.zip | |
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>
Diffstat (limited to 'include/linux/pstore_ram.h')
| -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 c668c861c96c..244d2423dbaf 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; |