linux-kernel - [PATCH 1/3] sh: Cleanup about SPARSE

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Date:   Mon, 27 Sep 2021 16:14:00 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Thomas Gleixner <tglx@...utronix.de>, Guo Ren <guoren@...nel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, <linux-sh@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-csky@...r.kernel.org>
CC:     Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 1/3] sh: Cleanup about SPARSE_IRQ

After commit 37744feebc08 ("sh: remove sh5 support"), sh always
enable SPARSE_IRQ, kill unused MAY_HAVE_SPARSE_IRQ and NR_IRQS
define under !CONFIG_SPARSE_IRQ.

Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc: Rich Felker <dalias@...c.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 arch/sh/Kconfig           | 1 -
 arch/sh/include/asm/irq.h | 9 ---------
 2 files changed, 10 deletions(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 6904f4bdbf00..70afb30e0b32 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -56,7 +56,6 @@ config SUPERH
 	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS
 	select IRQ_FORCED_THREADING
-	select MAY_HAVE_SPARSE_IRQ
 	select MODULES_USE_ELF_RELA
 	select NEED_SG_DMA_LENGTH
 	select NO_DMA if !MMU && !DMA_COHERENT
diff --git a/arch/sh/include/asm/irq.h b/arch/sh/include/asm/irq.h
index 839551ce398c..5a7b6e324e4c 100644
--- a/arch/sh/include/asm/irq.h
+++ b/arch/sh/include/asm/irq.h
@@ -5,16 +5,7 @@
 #include <linux/cpumask.h>
 #include <asm/machvec.h>
 
-/*
- * Only legacy non-sparseirq platforms have to set a reasonably sane
- * value here. sparseirq platforms allocate their irq_descs on the fly,
- * so will expand automatically based on the number of registered IRQs.
- */
-#ifdef CONFIG_SPARSE_IRQ
 # define NR_IRQS		8
-#else
-# define NR_IRQS		512
-#endif
 
 /*
  * This is a special IRQ number for indicating that no IRQ has been
-- 
2.26.2