From: changbin.du@intel.com
To: yamada.masahiro@socionext.com, michal.lkml@markovi.net,
tglx@linutronix.de, mingo@redhat.com, akpm@linux-foundation.org
Cc: rostedt@goodmis.org, rdunlap@infradead.org, x86@kernel.org,
lgirdwood@gmail.com, broonie@kernel.org, arnd@arndb.de,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, Changbin Du <changbin.du@intel.com>
Subject: [PATCH v2 2/5] regulator: add dummy function of_find_regulator_by_node
Date: Wed, 2 May 2018 21:44:57 +0800 [thread overview]
Message-ID: <1525268700-10631-3-git-send-email-changbin.du@intel.com> (raw)
In-Reply-To: <1525268700-10631-1-git-send-email-changbin.du@intel.com>
From: Changbin Du <changbin.du@intel.com>
If device tree is not enabled, of_find_regulator_by_node() should have
a dummy function since the function call is still there.
This is to fix build error after CONFIG_NO_AUTO_INLINE is introduced.
If this option is enabled, GCC will not auto-inline functions that are
not explicitly marked as inline.
In this case (no CONFIG_OF), the copmiler will report error in function
regulator_dev_lookup().
W/O NO_AUTO_INLINE, function of_get_regulator() is auto-inlined and then
the call to of_find_regulator_by_node() is optimized out since
of_get_regulator() always return NULL.
W/ NO_AUTO_INLINE, the return value of of_get_regulator() is a variable
so the call to of_find_regulator_by_node() cannot be optimized out. So
we need a stub of_find_regulator_by_node().
static struct regulator_dev *regulator_dev_lookup(struct device *dev,
const char *supply)
{
struct regulator_dev *r = NULL;
struct device_node *node;
struct regulator_map *map;
const char *devname = NULL;
regulator_supply_alias(&dev, &supply);
/* first do a dt based lookup */
if (dev && dev->of_node) {
node = of_get_regulator(dev, supply);
if (node) {
r = of_find_regulator_by_node(node);
if (r)
return r;
...
Signed-off-by: Changbin Du <changbin.du@intel.com>
---
drivers/regulator/internal.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/regulator/internal.h b/drivers/regulator/internal.h
index abfd56e..24fde1e 100644
--- a/drivers/regulator/internal.h
+++ b/drivers/regulator/internal.h
@@ -56,14 +56,19 @@ static inline struct regulator_dev *dev_to_rdev(struct device *dev)
return container_of(dev, struct regulator_dev, dev);
}
-struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
-
#ifdef CONFIG_OF
+struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
struct regulator_config *config,
struct device_node **node);
#else
+static inline struct regulator_dev *
+of_find_regulator_by_node(struct device_node *np)
+{
+ return NULL;
+}
+
static inline struct regulator_init_data *
regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
--
2.7.4
next prev parent reply other threads:[~2018-05-02 13:55 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-02 13:44 [PATCH v2 0/5] kernel hacking: GCC optimization for debug experience (-Og) changbin.du
2018-05-02 13:44 ` [PATCH v2 1/5] x86/mm: surround level4_kernel_pgt with #ifdef CONFIG_X86_5LEVEL...#endif changbin.du
2018-05-02 13:44 ` changbin.du [this message]
2018-05-02 13:44 ` [PATCH v2 3/5] kernel hacking: new config NO_AUTO_INLINE to disable compiler auto-inline optimizations changbin.du
2018-05-02 14:07 ` Steven Rostedt
2018-05-02 20:27 ` Arnd Bergmann
2018-05-03 13:00 ` Du, Changbin
2018-05-03 14:16 ` Steven Rostedt
2018-05-02 13:44 ` [PATCH v2 4/5] kernel hacking: new config DEBUG_EXPERIENCE to apply GCC -Og optimization changbin.du
2018-05-02 14:17 ` Steven Rostedt
2018-05-02 20:45 ` Andrew Morton
2018-05-03 1:19 ` Steven Rostedt
2018-05-03 13:45 ` Du, Changbin
2018-05-03 14:28 ` Steven Rostedt
2018-05-05 23:57 ` Du, Changbin
2018-05-06 0:27 ` Randy Dunlap
2018-05-02 19:26 ` Randy Dunlap
2018-05-02 13:45 ` [PATCH v2 5/5] asm-generic: fix build error in fix_to_virt with CONFIG_DEBUG_EXPERIENCE changbin.du
2018-05-02 14:19 ` Steven Rostedt
2018-05-03 13:25 ` Du, Changbin
2018-05-03 14:19 ` Steven Rostedt
2018-05-03 16:39 ` weylin
2018-05-02 14:56 ` [PATCH v2 0/5] kernel hacking: GCC optimization for debug experience (-Og) Daniel Thompson
2018-05-03 13:49 ` Du, Changbin
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