linux-kernel - [tip:core/urgent] memblock: Document memblock_is_region

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <tip-eab309494ae2b9e15f85520f00de3893162c2e43@git.kernel.org>
Date:	Fri, 8 Jun 2012 07:54:33 -0700
From:	tip-bot for Stephen Boyd <sboyd@...eaurora.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	tj@...nel.org, tglx@...utronix.de, sboyd@...eaurora.org
Subject: [tip:core/urgent] memblock: Document memblock_is_region_{memory,
 reserved}()

Commit-ID:  eab309494ae2b9e15f85520f00de3893162c2e43
Gitweb:     http://git.kernel.org/tip/eab309494ae2b9e15f85520f00de3893162c2e43
Author:     Stephen Boyd <sboyd@...eaurora.org>
AuthorDate: Thu, 24 May 2012 00:45:21 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 8 Jun 2012 11:59:46 +0200

memblock: Document memblock_is_region_{memory,reserved}()

At first glance one would think that memblock_is_region_memory()
and memblock_is_region_reserved() would be implemented in the
same way. Unfortunately they aren't and the former returns
whether the region specified is a subset of a memory bank while
the latter returns whether the region specified intersects with
reserved memory.

Document the two functions so that users aren't tempted to
make the implementation the same between them and to clarify the
purpose of the functions.

Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
Cc: Tejun Heo <tj@...nel.org>
Link: http://lkml.kernel.org/r/1337845521-32755-1-git-send-email-sboyd@codeaurora.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 mm/memblock.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index 952123e..32a0a5e 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -867,6 +867,16 @@ int __init_memblock memblock_is_memory(phys_addr_t addr)
 	return memblock_search(&memblock.memory, addr) != -1;
 }
 
+/**
+ * memblock_is_region_memory - check if a region is a subset of memory
+ * @base: base of region to check
+ * @size: size of region to check
+ *
+ * Check if the region [@base, @base+@...e) is a subset of a memory block.
+ *
+ * RETURNS:
+ * 0 if false, non-zero if true
+ */
 int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
 {
 	int idx = memblock_search(&memblock.memory, base);
@@ -879,6 +889,16 @@ int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size
 		 memblock.memory.regions[idx].size) >= end;
 }
 
+/**
+ * memblock_is_region_reserved - check if a region intersects reserved memory
+ * @base: base of region to check
+ * @size: size of region to check
+ *
+ * Check if the region [@base, @base+@...e) intersects a reserved memory block.
+ *
+ * RETURNS:
+ * 0 if false, non-zero if true
+ */
 int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)
 {
 	memblock_cap_size(base, &size);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/