path: root/mm/Kconfig.debug
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authorLi Zefan <>2009-03-31 15:23:16 -0700
committerLinus Torvalds <>2009-04-01 08:59:13 -0700
commit610a77e04a8d9fe8764dc484e2182fa251ce1cc2 (patch)
treeec55b9b3698321c3e85cd649fa927554027c75d0 /mm/Kconfig.debug
parente2f17d9459aeccf4e013e31cbd741d6b1858eec4 (diff)
memdup_user(): introduce
I notice there are many places doing copy_from_user() which follows kmalloc(): dst = kmalloc(len, GFP_KERNEL); if (!dst) return -ENOMEM; if (copy_from_user(dst, src, len)) { kfree(dst); return -EFAULT } memdup_user() is a wrapper of the above code. With this new function, we don't have to write 'len' twice, which can lead to typos/mistakes. It also produces smaller code and kernel text. A quick grep shows 250+ places where memdup_user() *may* be used. I'll prepare a patchset to do this conversion. Signed-off-by: Li Zefan <> Cc: KOSAKI Motohiro <> Cc: Americo Wang <> Cc: Alexey Dobriyan <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/Kconfig.debug')
0 files changed, 0 insertions, 0 deletions