linux-kernel - [PATCH v2 3/6] ARM: change vmalloc_min to vmalloc

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Message-Id: <E1lmZSw-0005TI-0s@rmk-PC.armlinux.org.uk>
Date:   Fri, 28 May 2021 11:11:42 +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 v2 3/6] ARM: change vmalloc_min to vmalloc_start

Change the current vmalloc_min, which is supposed to be the lowest
address of vmalloc space including the VMALLOC_OFFSET, to vmalloc_start
which does not include VMALLOC_OFFSET.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 arch/arm/mm/mmu.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index d932c46a02e0..ed2846bdb1f4 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1123,8 +1123,7 @@ void __init debug_ll_io_init(void)
 }
 #endif
 
-static unsigned long __initdata vmalloc_min =
-	VMALLOC_END - (240 << 20) - VMALLOC_OFFSET;
+static unsigned long __initdata vmalloc_start = VMALLOC_END - (240 << 20);
 
 /*
  * vmalloc=size forces the vmalloc area to be exactly 'size'
@@ -1142,14 +1141,14 @@ static int __init early_vmalloc(char *arg)
 			vmalloc_reserve >> 20);
 	}
 
-	vmalloc_max = VMALLOC_END - (PAGE_OFFSET + SZ_32M);
+	vmalloc_max = VMALLOC_END - (PAGE_OFFSET + SZ_32M + VMALLOC_OFFSET);
 	if (vmalloc_reserve > vmalloc_max) {
 		vmalloc_reserve = vmalloc_max;
 		pr_warn("vmalloc area is too big, limiting to %luMB\n",
 			vmalloc_reserve >> 20);
 	}
 
-	vmalloc_min = VMALLOC_END - vmalloc_reserve;
+	vmalloc_start = VMALLOC_END - vmalloc_reserve;
 	return 0;
 }
 early_param("vmalloc", early_vmalloc);
@@ -1169,7 +1168,8 @@ 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_min - PAGE_OFFSET + PHYS_OFFSET;
+	vmalloc_limit = (u64)vmalloc_start - VMALLOC_OFFSET -
+			PAGE_OFFSET + PHYS_OFFSET;
 
 	/*
 	 * The first usable region must be PMD aligned. Mark its start
-- 
2.20.1