linux-kernel - [PATCH 31/31] memblock: Add memblock_find_in

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

Message-Id: <1279822864-17154-32-git-send-email-yinghai@kernel.org>
Date:	Thu, 22 Jul 2010 11:21:04 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Johannes Weiner <hannes@...xchg.org>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 31/31] memblock: Add memblock_find_in_range()

it is a wrapper for memblock_find_base

make it more easy for x86 to use memblock. ( rebase )
x86 early_res is using find/reserve pattern instead of alloc.

keep it in weak version, so later We can use x86 own version if needed.
also We need it in mm/memblock.c, so one caller mm/page_alloc.c could get compiled

-v2: Change name to memblock_find_in_range() according to Michael Ellerman
-v3: Add generic weak version __memblock_find_in_range()
     so keep the path for fallback to x86 version that handle from low
-v4: use 0 for failing path
-v5: use MEMBLOCK_ERROR again
-v6: remove __memblock_find_in_range()

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 include/linux/memblock.h |    2 ++
 mm/memblock.c            |    8 ++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 751a4eb..61b22eb 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -48,6 +48,8 @@ extern struct memblock_region memblock_reserved_init_regions[];
 #define memblock_dbg(fmt, ...) \
 	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
 
+u64 memblock_find_in_range(u64 start, u64 end, u64 size, u64 align);
+
 extern void __init memblock_init(void);
 extern void __init memblock_analyze(void);
 extern long memblock_add(phys_addr_t base, phys_addr_t size);
diff --git a/mm/memblock.c b/mm/memblock.c
index 7471dac..ca7de91 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -156,6 +156,14 @@ static phys_addr_t __init memblock_find_base(phys_addr_t size, phys_addr_t align
 	return MEMBLOCK_ERROR;
 }
 
+/*
+ * Find a free area with specified alignment in a specific range.
+ */
+u64 __init __weak memblock_find_in_range(u64 start, u64 end, u64 size, u64 align)
+{
+	return memblock_find_base(size, align, start, end);
+}
+
 static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r)
 {
 	unsigned long i;
-- 
1.6.4.2

--
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/