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x86/irq/32: Use named operands in inline asm

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Also use inout "+" constraint modifier where appropriate.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250303155446.112769-1-ubizjak@gmail.com
This commit is contained in:
Uros Bizjak 2025-03-03 16:54:21 +01:00 committed by Ingo Molnar
parent 224788b63a
commit 0ec914707c
1 changed files with 9 additions and 11 deletions
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20
arch/x86/kernel/irq_32.c
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@ -54,12 +54,11 @@ static inline void print_stack_overflow(void) { }
static void call_on_stack(void *func, void *stack)
{
asm volatile("xchgl %%ebx,%%esp \n"
asm volatile("xchgl %[sp], %%esp\n"
CALL_NOSPEC
"movl %%ebx,%%esp \n"
: "=b" (stack)
: "0" (stack),
[thunk_target] "D"(func)
"movl %[sp], %%esp"
: [sp] "+b" (stack)
: [thunk_target] "D" (func)
: "memory", "cc", "edx", "ecx", "eax");
}
@ -71,7 +70,7 @@ static inline void *current_stack(void)
static inline int execute_on_irq_stack(int overflow, struct irq_desc *desc)
{
struct irq_stack *curstk, *irqstk;
u32 *isp, *prev_esp, arg1;
u32 *isp, *prev_esp;
curstk = (struct irq_stack *) current_stack();
irqstk = __this_cpu_read(pcpu_hot.hardirq_stack_ptr);
@ -94,12 +93,11 @@ static inline int execute_on_irq_stack(int overflow, struct irq_desc *desc)
if (unlikely(overflow))
call_on_stack(print_stack_overflow, isp);
asm volatile("xchgl %%ebx,%%esp \n"
asm volatile("xchgl %[sp], %%esp\n"
CALL_NOSPEC
"movl %%ebx,%%esp \n"
: "=a" (arg1), "=b" (isp)
: "0" (desc), "1" (isp),
[thunk_target] "D" (desc->handle_irq)
"movl %[sp], %%esp"
: "+a" (desc), [sp] "+b" (isp)
: [thunk_target] "D" (desc->handle_irq)
: "memory", "cc", "ecx");
return 1;
}