xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

OF: convert devtree lock from rw_lock to raw spinlock

Browse Source 
With the locking cleanup in place (from "OF: Fixup resursive
locking code paths"), we can now do the conversion from the
rw_lock to a raw spinlock as required for preempt-rt.

The previous cleanup and this conversion were originally
separate since they predated when mainline got raw spinlock (in
commit c2f21ce2e3 "locking: Implement new raw_spinlock").

So, at that point in time, the cleanup was considered plausible
for mainline, but not this conversion.  In any case, we've kept
them separate as it makes for easier review and better bisection.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[PG: taken from preempt-rt, update subject & add a commit log]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Thomas Gleixner
2013-02-06 15:30:56 -05:00
committed by Rob Herring
parent eb7ccb8184
commit d6d3c4e656
3 changed files with 59 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/of.h
View File

@@ -92,7 +92,7 @@ static inline void of_node_put(struct device_node *node) { }
extern struct device_node *of_allnodes;
extern struct device_node *of_chosen;
extern struct device_node *of_aliases;
extern rwlock_t devtree_lock;
extern raw_spinlock_t devtree_lock;
static inline bool of_have_populated_dt(void)
{