linux-kernel - [PATCH v3 2/2] ACPI,acpi_memhotplug: Remove acpi_memory

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Date:	Fri, 22 Mar 2013 10:53:49 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Toshi Kani <toshi.kani@...com>
CC:	<rjw@...k.pl>, <linux-acpi@...r.kernel.org>,
	<tangchen@...fujitsu.com>, <wency@...fujitsu.com>,
	<laijs@...fujitsu.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 2/2] ACPI,acpi_memhotplug: Remove acpi_memory_info->failed
 bit

acpi_memory_info has enabled bit and failed bit for controlling memory
hotplug. But we don't need to keep both bits.

The patch removes acpi_memory_info->failed bit.

Signed-off-by: yasuaki ishimatsu <isimatu.yasuaki@...fujitsu.com>
---

v3 : Continue to memory hot remove when (!info->enabled) case.
v2 : Changed a based kernel from linux-3.9-rc2 to linux-pm.git/bleeding-edge.

---
  drivers/acpi/acpi_memhotplug.c |   15 ++-------------
  1 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index ea78988..5e6301e 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -73,7 +73,6 @@ struct acpi_memory_info {
  	unsigned short caching;	/* memory cache attribute */
  	unsigned short write_protect;	/* memory read/write attribute */
  	unsigned int enabled:1;
-	unsigned int failed:1;
  };
  
  struct acpi_memory_device {
@@ -201,10 +200,8 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
  		 * returns -EEXIST. If add_memory() returns the other error, it
  		 * means that this memory block is not used by the kernel.
  		 */
-		if (result && result != -EEXIST) {
-			info->failed = 1;
+		if (result && result != -EEXIST)
  			continue;
-		}
  
  		info->enabled = 1;
  
@@ -238,16 +235,8 @@ static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device)
  	nid = acpi_get_node(mem_device->device->handle);
  
  	list_for_each_entry_safe(info, n, &mem_device->res_list, list) {
-		if (info->failed)
-			/* The kernel does not use this memory block */
-			continue;
-
  		if (!info->enabled)
-			/*
-			 * The kernel uses this memory block, but it may be not
-			 * managed by us.
-			 */
-			return -EBUSY;
+			continue;
  
  		if (nid < 0)
  			nid = memory_add_physaddr_to_nid(info->start_addr);


View attachment "0002-Remove-acpi_memory_info-failed-bit.patch" of type "text/x-patch" (1844 bytes)