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authorJeff Garzik <jeff@garzik.org>2006-08-03 17:35:48 -0400
committerJeff Garzik <jeff@garzik.org>2006-08-03 17:35:48 -0400
commit36a2c6b28003dd0592b8ece5e9409991e0820f50 (patch)
treec5b52547b2658a8a3b898b8224b835a7e8396017 /arch/i386/kernel/machine_kexec.c
parent95916edd02e3a7752315422f386c55723d4a3637 (diff)
parentf1d39b291e2263f5e2f2ec5d4061802f76d8ae67 (diff)
Merge branch 'upstream-fixes' into upstream
Diffstat (limited to 'arch/i386/kernel/machine_kexec.c')
-rw-r--r--arch/i386/kernel/machine_kexec.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c
index 511abe52a94e..6b1ae6ba76f0 100644
--- a/arch/i386/kernel/machine_kexec.c
+++ b/arch/i386/kernel/machine_kexec.c
@@ -189,14 +189,11 @@ NORET_TYPE void machine_kexec(struct kimage *image)
189 memcpy((void *)reboot_code_buffer, relocate_new_kernel, 189 memcpy((void *)reboot_code_buffer, relocate_new_kernel,
190 relocate_new_kernel_size); 190 relocate_new_kernel_size);
191 191
192 /* The segment registers are funny things, they are 192 /* The segment registers are funny things, they have both a
193 * automatically loaded from a table, in memory wherever you 193 * visible and an invisible part. Whenever the visible part is
194 * set them to a specific selector, but this table is never 194 * set to a specific selector, the invisible part is loaded
195 * accessed again you set the segment to a different selector. 195 * with from a table in memory. At no other time is the
196 * 196 * descriptor table in memory accessed.
197 * The more common model is are caches where the behide
198 * the scenes work is done, but is also dropped at arbitrary
199 * times.
200 * 197 *
201 * I take advantage of this here by force loading the 198 * I take advantage of this here by force loading the
202 * segments, before I zap the gdt with an invalid value. 199 * segments, before I zap the gdt with an invalid value.