github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-10 15:42:19 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

[ARM] fiq glue: Align fiq stacks

Browse Source 
Change-Id: I956f05d0b0ce48572e611765e56a439dc036c052
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross 2010-10-05 22:08:01 -07:00
parent 3dd081ae2c
commit 6098ced7ab
1 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
arch/arm/common/fiq_glue_setup.c
View File

@ -23,7 +23,7 @@ extern void fiq_glue_setup(void *func, void *data, void *sp);
static struct fiq_handler fiq_debbuger_fiq_handler = {
.name = "fiq_glue",
};
static __percpu void *fiq_stack;
DEFINE_PER_CPU(void *, fiq_stack);
static struct fiq_glue_handler *current_handler;
static DEFINE_MUTEX(fiq_glue_lock);
@ -31,12 +31,13 @@ static void fiq_glue_setup_helper(void *info)
{
struct fiq_glue_handler *handler = info;
fiq_glue_setup(handler->fiq, handler,
__this_cpu_ptr(fiq_stack) + THREAD_START_SP);
__get_cpu_var(fiq_stack) + THREAD_START_SP);
}
int fiq_glue_register_handler(struct fiq_glue_handler *handler)
{
int ret;
int cpu;
if (!handler || !handler->fiq)
return -EINVAL;
@ -47,10 +48,14 @@ int fiq_glue_register_handler(struct fiq_glue_handler *handler)
goto err_busy;
}
fiq_stack = __alloc_percpu(THREAD_SIZE, L1_CACHE_BYTES);
if (WARN_ON(!fiq_stack)) {
ret = -ENOMEM;
goto err_alloc_fiq_stack;
for_each_possible_cpu(cpu) {
void *stack;
stack = (void *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
if (WARN_ON(!stack)) {
ret = -ENOMEM;
goto err_alloc_fiq_stack;
}
per_cpu(fiq_stack, cpu) = stack;
}
ret = claim_fiq(&fiq_debbuger_fiq_handler);
@ -61,12 +66,15 @@ int fiq_glue_register_handler(struct fiq_glue_handler *handler)
on_each_cpu(fiq_glue_setup_helper, handler, true);
set_fiq_handler(&fiq_glue, &fiq_glue_end - &fiq_glue);
mutex_unlock(&fiq_glue_lock);
return 0;
err_claim_fiq:
if (ret) {
free_percpu(fiq_stack);
fiq_stack = NULL;
}
err_alloc_fiq_stack:
for_each_possible_cpu(cpu) {
__free_pages(per_cpu(fiq_stack, cpu), THREAD_SIZE_ORDER);
per_cpu(fiq_stack, cpu) = NULL;
}
err_busy:
mutex_unlock(&fiq_glue_lock);
return ret;
@ -85,7 +93,7 @@ void fiq_glue_resume(void)
if (!current_handler)
return;
fiq_glue_setup(current_handler->fiq, current_handler,
__this_cpu_ptr(fiq_stack) + THREAD_START_SP);
__get_cpu_var(fiq_stack) + THREAD_START_SP);
if (current_handler->resume)
current_handler->resume(current_handler);
}