From: Linus Torvalds Date: Tue, 21 Feb 2012 18:25:45 +0000 (-0800) Subject: i387: Uninline the generic FP helpers that we expose to kernel modules X-Git-Tag: v3.4-rc1~151^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8546c008924d5fd1724fa698eaa92b414bafd50d;p=pandora-kernel.git i387: Uninline the generic FP helpers that we expose to kernel modules Instead of exporting the very low-level internals of the FPU state save/restore code (ie things like 'fpu_owner_task'), we should export the higher-level interfaces. Inlining these things is pointless anyway: sure, sometimes the end result is small, but while 'stts()' can result in just three x86 instructions, those are not cheap instructions (writing %cr0 is a serializing instruction and a very slow one at that). So the overhead of a function call is not noticeable, and we really don't want random modules mucking about with our internal state save logic anyway. So this unexports 'fpu_owner_task', and instead uninlines and exports the actual functions that modules can use: fpu_kernel_begin/end() and unlazy_fpu(). Signed-off-by: Linus Torvalds Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1202211339590.5354@i5.linux-foundation.org Signed-off-by: H. Peter Anvin --- Reading git-diff-tree failed