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sparc64: get rid of fake_swapper_regs

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no reason to have ->kregs of initial thread set up in a special
way - we can keep them on stack, same as for every other thread.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2020-08-19 17:50:40 -04:00
parent 5c8fe583cc
commit d17b9ec777
3 changed files with 2 additions and 5 deletions
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1
arch/sparc/include/asm/thread_info_64.h
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@@ -118,6 +118,7 @@ struct thread_info {
.task = &tsk, \ .task = &tsk, \
.current_ds = ASI_P, \ .current_ds = ASI_P, \
.preempt_count = INIT_PREEMPT_COUNT, \ .preempt_count = INIT_PREEMPT_COUNT, \
.kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \
} }
/* how to get the thread information struct from C */ /* how to get the thread information struct from C */

2
arch/sparc/kernel/head_64.S
View File

@@ -706,7 +706,7 @@ tlb_fixup_done:
wr %g0, ASI_P, %asi wr %g0, ASI_P, %asi
mov 1, %g1 mov 1, %g1
sllx %g1, THREAD_SHIFT, %g1 sllx %g1, THREAD_SHIFT, %g1
sub %g1, (STACKFRAME_SZ + STACK_BIAS), %g1 sub %g1, (STACKFRAME_SZ + STACK_BIAS + TRACEREG_SZ), %g1
add %g6, %g1, %sp add %g6, %g1, %sp
/* Set per-cpu pointer initially to zero, this makes /* Set per-cpu pointer initially to zero, this makes

4
arch/sparc/kernel/setup_64.c
View File

@@ -165,8 +165,6 @@ extern int root_mountflags;
char reboot_command[COMMAND_LINE_SIZE]; char reboot_command[COMMAND_LINE_SIZE];
static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
static void __init per_cpu_patch(void) static void __init per_cpu_patch(void)
{ {
struct cpuid_patch_entry *p; struct cpuid_patch_entry *p;
@@ -661,8 +659,6 @@ void __init setup_arch(char **cmdline_p)
rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
#endif #endif
task_thread_info(&init_task)->kregs = &fake_swapper_regs;
#ifdef CONFIG_IP_PNP #ifdef CONFIG_IP_PNP
if (!ic_set_manually) { if (!ic_set_manually) {
phandle chosen = prom_finddevice("/chosen"); phandle chosen = prom_finddevice("/chosen");