linux-kernel - [PATCH 4/4] ARM: change vmalloc_start to vmalloc

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Date:   Tue, 18 May 2021 13:15:55 +0100
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Yanfei Xu <yanfei.xu@...driver.com>
Cc:     rppt@...nel.org, ardb@...nel.org, linus.walleij@...aro.org,
        akpm@...ux-foundation.org, carver4lio@....com,
        tiantao6@...ilicon.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] ARM: change vmalloc_start to vmalloc_size

Rather than storing the start of vmalloc space, store the size, and
move the calculation into adjust_lowmem_limit(). We now have one single
place where this calculation takes place.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 arch/arm/mm/mmu.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 457203b41ceb..2c74f1230cc7 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1123,7 +1123,7 @@ void __init debug_ll_io_init(void)
 }
 #endif
 
-static unsigned long __initdata vmalloc_start = VMALLOC_END - (240 << 20);
+static unsigned long __initdata vmalloc_size = 240 << 20;
 
 /*
  * vmalloc=size forces the vmalloc area to be exactly 'size'
@@ -1148,7 +1148,7 @@ static int __init early_vmalloc(char *arg)
 			vmalloc_reserve >> 20);
 	}
 
-	vmalloc_start = VMALLOC_END - vmalloc_reserve;
+	vmalloc_size = vmalloc_reserve;
 	return 0;
 }
 early_param("vmalloc", early_vmalloc);
@@ -1168,7 +1168,7 @@ void __init adjust_lowmem_bounds(void)
 	 * and may itself be outside the valid range for which phys_addr_t
 	 * and therefore __pa() is defined.
 	 */
-	vmalloc_limit = (u64)vmalloc_start -
+	vmalloc_limit = (u64)(VMALLOC_END - vmalloc_size) -
 			(PAGE_OFFSET + PHYS_OFFSET + VMALLOC_OFFSET);
 
 	/*
-- 
2.20.1