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MIPS: DEC: Remove do_IRQ() call indirection

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As from commit 8f99a16265 ("MIPS: Tracing: Add IRQENTRY_EXIT section
for MIPS") do_IRQ() is not a macro anymore and can be invoked directly
from assembly code, as a tail call.  Remove the dec_irq_dispatch() stub
then and the indirection previously introduced with commit 187933f236
("[MIPS] do_IRQ cleanup"), improving performance by reducing the number
of control flow changes and the overall instruction count, while fixing
a compiler's complaint about a missing prototype for said stub:

arch/mips/dec/setup.c:780:25: warning: no previous prototype for 'dec_irq_dispatch' [-Wmissing-prototypes]
  780 | asmlinkage unsigned int dec_irq_dispatch(unsigned int irq)
      |                         ^~~~~~~~~~~~~~~~

(which gets promoted to a compilation error with CONFIG_WERROR).

Fixes: 8f99a16265 ("MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS")
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Maciej W. Rozycki 2026-05-04 21:14:00 +01:00 committed by Thomas Bogendoerfer
parent a032121b27
commit 35554eadc1
2 changed files with 1 additions and 7 deletions
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2
arch/mips/dec/int-handler.S
View File

@ -277,7 +277,7 @@
srlv t3,t1,t2
handle_it:
j dec_irq_dispatch
j do_IRQ
nop
#if defined(CONFIG_32BIT) && defined(CONFIG_MIPS_FP_SUPPORT)

6
arch/mips/dec/setup.c
View File

@ -776,9 +776,3 @@ void __init arch_init_irq(void)
pr_err("Failed to register halt interrupt\n");
}
}
asmlinkage unsigned int dec_irq_dispatch(unsigned int irq)
{
do_IRQ(irq);
return 0;
}