forked from Minki/linux
7c3576d261
Currently x86 (similar to x84-64) has a special per-cpu structure called "i386_pda" which can be easily and efficiently referenced via the %fs register. An ELF section is more flexible than a structure, allowing any piece of code to use this area. Indeed, such a section already exists: the per-cpu area. So this patch: (1) Removes the PDA and uses per-cpu variables for each current member. (2) Replaces the __KERNEL_PDA segment with __KERNEL_PERCPU. (3) Creates a per-cpu mirror of __per_cpu_offset called this_cpu_off, which can be used to calculate addresses for this CPU's variables. (4) Simplifies startup, because %fs doesn't need to be loaded with a special segment at early boot; it can be deferred until the first percpu area is allocated (or never for UP). The result is less code and one less x86-specific concept. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> |
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.. | ||
cpufreq | ||
mcheck | ||
mtrr | ||
amd.c | ||
bugs.c | ||
centaur.c | ||
common.c | ||
cpu.h | ||
cyrix.c | ||
intel_cacheinfo.c | ||
intel.c | ||
Makefile | ||
nexgen.c | ||
proc.c | ||
rise.c | ||
transmeta.c | ||
umc.c |