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Make reference count a uin16_t and save a couple of bytes.

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This commit is contained in:
Gregory Nutt 2016-08-09 13:54:57 -06:00
parent 01fd4952f9
commit b5b7a21bb6
1 changed files with 4 additions and 3 deletions
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7
arch/arm/src/stm32/stm32_pwr.c
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@ -83,9 +83,9 @@ static inline void stm32_pwr_modifyreg(uint8_t offset, uint16_t clearbits, uint1
* Enables access to the backup domain (RTC registers, RTC backup data registers
* and backup SRAM).
*
* NOTE: Reference counting is used in order to supported nested calles to this
* NOTE: Reference counting is used in order to supported nested calls to this
* function. As a consequence, every call to stm32_pwr_enablebkp(true) must
* be followed by a call to stm32_pwr_enablebkp(false).
* be followed by a matching call to stm32_pwr_enablebkp(false).
*
* Input Parameters:
* writable - True: enable ability to write to backup domain registers
@ -97,7 +97,7 @@ static inline void stm32_pwr_modifyreg(uint8_t offset, uint16_t clearbits, uint1
void stm32_pwr_enablebkp(bool writable)
{
static uint32_t writable_counter = 0;
static uint16_t writable_counter = 0;
irqstate_t flags;
uint16_t regval;
bool waswritable;
@ -112,6 +112,7 @@ void stm32_pwr_enablebkp(bool writable)
if (writable)
{
DEBUGASSERT(writable_counter < UINT16_MAX);
writable_counter++;
}
else if (writable_counter > 0)