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drm/nouveau/core/mm: make it clearer what (type == 0) means

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-08-12 11:16:58 +10:00
parent a1fc50b4a5
commit 79456e1a10
2 changed files with 10 additions and 9 deletions
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18
drivers/gpu/drm/nouveau/core/core/mm.c
View File

@ -37,29 +37,29 @@ nouveau_mm_free(struct nouveau_mm *mm, struct nouveau_mm_node **pthis)
struct nouveau_mm_node *prev = node(this, prev);
struct nouveau_mm_node *next = node(this, next);
if (prev && prev->type == 0) {
if (prev && prev->type == NVKM_MM_TYPE_NONE) {
prev->length += this->length;
list_del(&this->nl_entry);
kfree(this); this = prev;
}
if (next && next->type == 0) {
if (next && next->type == NVKM_MM_TYPE_NONE) {
next->offset = this->offset;
next->length += this->length;
if (this->type == 0)
if (this->type == NVKM_MM_TYPE_NONE)
list_del(&this->fl_entry);
list_del(&this->nl_entry);
kfree(this); this = NULL;
}
if (this && this->type != 0) {
if (this && this->type != NVKM_MM_TYPE_NONE) {
list_for_each_entry(prev, &mm->free, fl_entry) {
if (this->offset < prev->offset)
break;
}
list_add_tail(&this->fl_entry, &prev->fl_entry);
this->type = 0;
this->type = NVKM_MM_TYPE_NONE;
}
}
@ -84,7 +84,7 @@ region_head(struct nouveau_mm *mm, struct nouveau_mm_node *a, u32 size)
a->offset += size;
a->length -= size;
list_add_tail(&b->nl_entry, &a->nl_entry);
if (b->type == 0)
if (b->type == NVKM_MM_TYPE_NONE)
list_add_tail(&b->fl_entry, &a->fl_entry);
return b;
}
@ -98,7 +98,7 @@ nouveau_mm_head(struct nouveau_mm *mm, u8 type, u32 size_max, u32 size_min,
u32 splitoff;
u32 s, e;
BUG_ON(!type);
BUG_ON(type == NVKM_MM_TYPE_NONE);
list_for_each_entry(this, &mm->free, fl_entry) {
e = this->offset + this->length;
@ -152,7 +152,7 @@ region_tail(struct nouveau_mm *mm, struct nouveau_mm_node *a, u32 size)
b->type = a->type;
list_add(&b->nl_entry, &a->nl_entry);
if (b->type == 0)
if (b->type == NVKM_MM_TYPE_NONE)
list_add(&b->fl_entry, &a->fl_entry);
return b;
}
@ -164,7 +164,7 @@ nouveau_mm_tail(struct nouveau_mm *mm, u8 type, u32 size_max, u32 size_min,
struct nouveau_mm_node *prev, *this, *next;
u32 mask = align - 1;
BUG_ON(!type);
BUG_ON(type == NVKM_MM_TYPE_NONE);
list_for_each_entry_reverse(this, &mm->free, fl_entry) {
u32 e = this->offset + this->length;

1
drivers/gpu/drm/nouveau/core/include/core/mm.h
View File

@ -6,6 +6,7 @@ struct nouveau_mm_node {
struct list_head fl_entry;
struct list_head rl_entry;
#define NVKM_MM_TYPE_NONE 0x00
u8 type;
u32 offset;
u32 length;