From: Vipin KUMAR <vipin.ku...@st.com>
change_bit routine is left implementation dependent until now.
This routine is now defined for arm platforms in asm-arm/bitops.h
The Flexible Static memory controller driver, placed in
mtd/nand/fsmc_nand.c needs this routine. FSMC is a memory controller
peripheral from ST. The new driver implements the NAND interface part
of the peripheral.
Signed-off-by: Vipin Kumar <vipin.ku...@st.com>
Signed-off-by: Amit Virdi <amit.vi...@st.com>
---
arch/arm/include/asm/bitops.h | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
index 879e20e..8ce1405 100644
--- a/arch/arm/include/asm/bitops.h
+++ b/arch/arm/include/asm/bitops.h
@@ -29,8 +29,6 @@ extern void set_bit(int nr, volatile void * addr);
extern void clear_bit(int nr, volatile void * addr);
-extern void change_bit(int nr, volatile void * addr);
-
static inline void __change_bit(int nr, volatile void *addr)
{
unsigned long mask = BIT_MASK(nr);
@@ -39,6 +37,15 @@ static inline void __change_bit(int nr, volatile void *addr)
*p ^= mask;
}
+static inline void change_bit(int nr, volatile void *addr)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ __change_bit(nr, addr);
+ local_irq_restore(flags);
+}
+
static inline int __test_and_set_bit(int nr, volatile void *addr)
{
unsigned long mask = BIT_MASK(nr);
--
1.7.2.2
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