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target/file: Fix 32-bit highmem breakage for SGL -> iovec mapping
authorSebastian Andrzej Siewior <bigeasy@linutronix.de>
Wed, 5 Dec 2012 11:08:29 +0000 (12:08 +0100)
committerNicholas Bellinger <nab@linux-iscsi.org>
Wed, 5 Dec 2012 21:01:44 +0000 (13:01 -0800)
commit40ff2c3b3da35dd3a00ac6722056a59b4b3f2caf
treeba5cb75ed6c6dd01b2191b35c470691e5347d35dtree | snapshot (tar.gz zip)
parent0ff8754981261a80f4b77db2536dfea92c2d4539commit | diff
target/file: Fix 32-bit highmem breakage for SGL -> iovec mapping

This patch changes vectored file I/O to use kmap + kunmap when mapping
incoming SGL memory -> struct iovec in order to properly support 32-bit
highmem configurations.  This is because an extra bounce buffer may be
required when processing scatterlist pages allocated with GFP_KERNEL.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
drivers/target/target_core_file.c diff | blob | blame | history