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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:17 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:16 +1100
commitccd35fb9f4da856b105ea0f1e0cab3702e8ae6ba (patch)
treeacb71aa4ae7d1f1ed17bdd79033a6bad5e27186d /mm/util.c
parent786a5e15b613a9cee4fc9139fc3113a5ab0fde79 (diff)
downloadlinux-ccd35fb9f4da856b105ea0f1e0cab3702e8ae6ba.tar.gz
kernel: kmem_ptr_validate considered harmful
This is a nasty and error prone API. It is no longer used, remove it. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'mm/util.c')
-rw-r--r--mm/util.c21
1 files changed, 0 insertions, 21 deletions
diff --git a/mm/util.c b/mm/util.c
index 73dac81e9f7..f126975ef23 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -186,27 +186,6 @@ void kzfree(const void *p)
}
EXPORT_SYMBOL(kzfree);
-int kern_ptr_validate(const void *ptr, unsigned long size)
-{
- unsigned long addr = (unsigned long)ptr;
- unsigned long min_addr = PAGE_OFFSET;
- unsigned long align_mask = sizeof(void *) - 1;
-
- if (unlikely(addr < min_addr))
- goto out;
- if (unlikely(addr > (unsigned long)high_memory - size))
- goto out;
- if (unlikely(addr & align_mask))
- goto out;
- if (unlikely(!kern_addr_valid(addr)))
- goto out;
- if (unlikely(!kern_addr_valid(addr + size - 1)))
- goto out;
- return 1;
-out:
- return 0;
-}
-
/*
* strndup_user - duplicate an existing string from user space
* @s: The string to duplicate