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authorJoel Fernandes <joelaf@google.com>2016-10-20 00:34:00 -0700
committerKees Cook <keescook@chromium.org>2016-11-11 10:35:37 -0800
commit109704492ef637956265ec2eb72ae7b3b39eb6f4 (patch)
tree8faf79b5252f5c7b14ce25d58c2d758b83ed7970 /include/linux/pstore_ram.h
parent959217c84c2765434cd2cbf3d7ffdc09e90834f9 (diff)
downloadlinux-next-109704492ef637956265ec2eb72ae7b3b39eb6f4.tar.gz
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.h1
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;