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authorAkinobu Mita <akinobu.mita@gmail.com>2013-07-08 16:01:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-09 10:33:30 -0700
commit1105200480b4faeb673d1b23658650b003302c06 (patch)
tree546433c5f8c403c296fa7e1f8929030b902514ed /lib/check_signature.c
parent0ea8530dcf762526459b29ac713a623b51fd691f (diff)
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lib/scatterlist: factor out sg_miter_get_next_page() from sg_miter_next()
This patchset introduces sg_pcopy_from_buffer() and sg_pcopy_to_buffer(), which copy data between a linear buffer and an SG list. The only difference between sg_pcopy_{from,to}_buffer() and sg_copy_{from,to}_buffer() is an additional argument that specifies the number of bytes to skip the SG list before copying. The main reason for introducing these functions is to fix a problem in scsi_debug module. And there is a local function in crypto/talitos module, which can be replaced by sg_pcopy_to_buffer(). This patch: sg_miter_get_next_page() is used to proceed page iterator to the next page if necessary, and will be used to implement the variants of sg_copy_{from,to}_buffer() later. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Imre Deak <imre.deak@intel.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Cc: Horia Geanta <horia.geanta@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/check_signature.c')
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