[PATCH 5/7] MIPS: dec: Remove dec_irq_dispatch()

[WangYuli]

Currently, dec_irq_dispatch() is exclusively invoked by int-handler.S.
Inline the do_IRQ call into int-handler.S to silence the compiler
warning.

Fix follow error with gcc-14 when -Werror:

arch/mips/dec/setup.c:780:25: error: no previous prototype for ‘dec_irq_dispatch’ [-Werror=missing-prototypes]
  780 | asmlinkage unsigned int dec_irq_dispatch(unsigned int irq)
      |                         ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[7]: *** [scripts/Makefile.build:207: arch/mips/dec/setup.o] Error 1
make[6]: *** [scripts/Makefile.build:465: arch/mips/dec] Error 2
make[5]: *** [scripts/Makefile.build:465: arch/mips] Error 2
make[5]: *** Waiting for unfinished jobs....
make[4]: *** [Makefile:1992: .] Error 2
make[3]: *** [debian/rules:74: build-arch] Error 2
dpkg-buildpackage: error: make -f debian/rules binary subprocess returned exit status 2
make[2]: *** [scripts/Makefile.package:126: bindeb-pkg] Error 2
make[1]: *** [/mnt/83364c87-f5ee-4ae8-b862-930f1bd74feb/Projects/CommitUpstream/LinuxKernel/Temp/linux/Makefile:1625: bindeb-pkg] Error 2
make: *** [Makefile:251: __sub-make] Error 2

Signed-off-by: WangYuli <wangyuli@xxxxxxxxxxxxx>
---
 arch/mips/dec/int-handler.S | 2 +-
 arch/mips/dec/setup.c       | 6 ------
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/mips/dec/int-handler.S b/arch/mips/dec/int-handler.S
index 011d1d678840..a0b439c90488 100644
--- a/arch/mips/dec/int-handler.S
+++ b/arch/mips/dec/int-handler.S
@@ -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)
diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
index 56a7ecf06b7b..6ba4c4973c9a 100644
--- a/arch/mips/dec/setup.c
+++ b/arch/mips/dec/setup.c
@@ -771,9 +771,3 @@ 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;
-}
-- 
2.47.2