From: Mark Nelson Date: Tue, 11 Nov 2008 00:53:34 +0000 (+0000) Subject: powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD X-Git-Tag: v2.6.29-rc1~574^2~117 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4e22f02f5b6518c1484faea1f88d81802b9feac;p=pandora-kernel.git powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD In exactly the same way that we updated memcpy() with new feature sections in commit 25d6e2d7c58ddc4a3b614fc5381591c0cfe66556 ("powerpc: Update 64bit memcpy() using CPU_FTR_UNALIGNED_LD_STD"), we do the same thing here for __copy_tofrom_user(). Once again this is purely a performance tweak for Cell and Power6 - this has no effect on all the other 64bit powerpc chips. We can make these same changes to __copy_tofrom_user() because the basic copy algorithm is the same as in memcpy() - this version just has all the exception handling logic needed when copying to or from userspace as well as a special case for copying whole 4K pages that are page aligned. CPU_FTR_UNALIGNED_LD_STD CPU was added in commit 4ec577a28980a0790df3c3dfe9c81f6e2222acfb ("powerpc: Add new CPU feature: CPU_FTR_UNALIGNED_LD_STD"). We also make the same simple one line change from cmpldi r1,... to cmpldi cr1,... for consistency. Signed-off-by: Mark Nelson Signed-off-by: Paul Mackerras --- Reading git-diff-tree failed