[tip: x86/asm] x86/irq/32: Change some static functions to bool

["tip-bot2 for Uros Bizjak" <tip-bot2@xxxxxxxxxxxxx>]

The following commit has been merged into the x86/asm branch of tip:

Commit-ID:     9c5f9473dfa0b13af72b8f856e2c87d36acaed90
Gitweb:        https://git.kernel.org/tip/9c5f9473dfa0b13af72b8f856e2c87d36acaed90
Author:        Uros Bizjak <ubizjak@xxxxxxxxx>
AuthorDate:    Mon, 03 Mar 2025 16:54:25 +01:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Tue, 04 Mar 2025 20:12:40 +01:00

x86/irq/32: Change some static functions to bool

The return values of these functions is 0/1, but they use an int
type instead of bool:

  check_stack_overflow()
  execute_on_irq_stack()

Change the type of these function to bool and adjust their return
values and affected helper variables.

[ mingo: Rewrote the changelog ]

Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20250303155446.112769-5-ubizjak@xxxxxxxxx
---
 arch/x86/kernel/irq_32.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 2428d66..566a93d 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -29,7 +29,7 @@
 int sysctl_panic_on_stackoverflow __read_mostly;
 
 /* Debugging check for stack overflow: is there less than 1KB free? */
-static int check_stack_overflow(void)
+static bool check_stack_overflow(void)
 {
 	unsigned long sp = current_stack_pointer & (THREAD_SIZE - 1);
 
@@ -45,7 +45,7 @@ static void print_stack_overflow(void)
 }
 
 #else
-static inline int check_stack_overflow(void) { return 0; }
+static inline bool check_stack_overflow(void) { return false; }
 static inline void print_stack_overflow(void) { }
 #endif
 
@@ -65,7 +65,7 @@ static inline void *current_stack(void)
 	return (void *)(current_stack_pointer & ~(THREAD_SIZE - 1));
 }
 
-static inline int execute_on_irq_stack(int overflow, struct irq_desc *desc)
+static inline bool execute_on_irq_stack(bool overflow, struct irq_desc *desc)
 {
 	struct irq_stack *curstk, *irqstk;
 	u32 *isp, *prev_esp;
@@ -80,7 +80,7 @@ static inline int execute_on_irq_stack(int overflow, struct irq_desc *desc)
 	 * current stack (which is the irq stack already after all)
 	 */
 	if (unlikely(curstk == irqstk))
-		return 0;
+		return false;
 
 	isp = (u32 *) ((char *)irqstk + sizeof(*irqstk));
 
@@ -98,7 +98,7 @@ static inline int execute_on_irq_stack(int overflow, struct irq_desc *desc)
 		     : [thunk_target] "D" (desc->handle_irq)
 		       COMMA(ASM_CALL_CONSTRAINT)
 		     : "memory", "cc", "edx", "ecx");
-	return 1;
+	return true;
 }
 
 /*
@@ -147,7 +147,7 @@ void do_softirq_own_stack(void)
 
 void __handle_irq(struct irq_desc *desc, struct pt_regs *regs)
 {
-	int overflow = check_stack_overflow();
+	bool overflow = check_stack_overflow();
 
 	if (user_mode(regs) || !execute_on_irq_stack(overflow, desc)) {
 		if (unlikely(overflow))