comments/docs: fix typos in comments

This fix some typos in comments.

Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>

arch/arm/include/irq.h

@@ -83,7 +83,7 @@ extern "C"
  ****************************************************************************/
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/arm64/include/irq.h

@@ -207,7 +207,7 @@ extern "C"
  ****************************************************************************/
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/avr/include/irq.h

@@ -74,7 +74,7 @@ extern "C"
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level register storage
- * structure.  If is non-NULL only during interrupt processing.
+ * structure.  It is non-NULL only during interrupt processing.
  */
 
 #ifdef CONFIG_ARCH_FAMILY_AVR32

arch/ceva/include/irq.h

@@ -94,7 +94,7 @@ extern "C"
 #endif
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/hc/include/irq.h

@@ -91,7 +91,7 @@ static inline uint16_t up_getsp(void)
  ****************************************************************************/
 
 /* This holds a references to the current interrupt level register storage
- * structure.  If is non-NULL only during interrupt processing.
+ * structure.  It is non-NULL only during interrupt processing.
  */
 
 EXTERN volatile uint8_t *g_current_regs;

arch/misoc/include/irq.h

@@ -77,7 +77,7 @@ static inline uint32_t up_getsp(void)
  ****************************************************************************/
 
 /* This holds a references to the current interrupt level register storage
- * structure.  If is non-NULL only during interrupt processing.
+ * structure.  It is non-NULL only during interrupt processing.
  */
 
 EXTERN volatile uint32_t *g_current_regs;

arch/or1k/include/irq.h

@@ -75,7 +75,7 @@ extern "C"
 #endif
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/renesas/include/irq.h

@@ -59,7 +59,7 @@ extern "C"
  ****************************************************************************/
 
 /* This holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during
+ * register storage structure.  It is non-NULL only during
  * interrupt processing.
  */
 

arch/risc-v/include/irq.h

@@ -620,7 +620,7 @@ extern "C"
 #endif
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/sim/include/irq.h

@@ -68,7 +68,7 @@ extern "C"
  ****************************************************************************/
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/sparc/include/irq.h

@@ -93,7 +93,7 @@ static inline uint32_t up_getsp(void)
  ****************************************************************************/
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/tricore/include/irq.h

@@ -61,7 +61,7 @@ extern "C"
  ****************************************************************************/
 
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/x86/include/irq.h

@@ -76,7 +76,7 @@ extern "C"
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level register storage
- * structure.  If is non-NULL only during interrupt processing.
+ * structure.  It is non-NULL only during interrupt processing.
  */
 
 EXTERN volatile uint32_t *g_current_regs;

arch/x86_64/include/irq.h

@@ -59,7 +59,7 @@
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level register storage
- * structure.  If is non-NULL only during interrupt processing.
+ * structure.  It is non-NULL only during interrupt processing.
  */
 
 extern volatile uint64_t *g_current_regs;

arch/xtensa/include/irq.h

@@ -367,7 +367,7 @@ extern "C"
 
 #ifndef __ASSEMBLY__
 /* g_current_regs[] holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during interrupt
+ * register storage structure.  It is non-NULL only during interrupt
  * processing.  Access to g_current_regs[] must be through the macro
  * CURRENT_REGS for portability.
  */

arch/z16/include/irq.h

@@ -72,7 +72,7 @@ chipreg_t up_getsp(void);
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level
- * register storage structure.  If is non-NULL only during
+ * register storage structure.  It is non-NULL only during
  * interrupt processing.
  */
 

arch/z80/src/ez80/switch.h

@@ -115,7 +115,7 @@
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level register
- * storage structure.  If is non-NULL only during interrupt processing.
+ * storage structure.  It is non-NULL only during interrupt processing.
  */
 
 extern volatile chipreg_t *g_current_regs;

arch/z80/src/z180/switch.h

@@ -170,7 +170,7 @@
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level register
- * storage structure.  If is non-NULL only during interrupt processing.
+ * storage structure.  It is non-NULL only during interrupt processing.
  */
 
 extern volatile chipreg_t *g_current_regs;

arch/z80/src/z80/switch.h

@@ -114,7 +114,7 @@
 
 #ifndef __ASSEMBLY__
 /* This holds a references to the current interrupt level register
- * storage structure.  If is non-NULL only during interrupt processing.
+ * storage structure.  It is non-NULL only during interrupt processing.
  */
 
 extern volatile chipreg_t *g_current_regs;