diff options
Diffstat (limited to 'arch/i386/kernel/machine_kexec.c')
-rw-r--r-- | arch/i386/kernel/machine_kexec.c | 13 |
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. |