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Revert "FROMLIST: memblock: handle overlapped reserved memory region"

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This reverts commit 0adf530671.
This commit is contained in:
Ksawlii 2024-12-18 11:05:10 +01:00
parent 58e2d66f91
commit 2381d696fa
1 changed files with 1 additions and 64 deletions
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65
mm/memblock.c
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@ -1993,65 +1993,6 @@ static void memsize_get_valid_name(char *valid_name, const char *name)
valid_name[val_size] = '\0';
}
static inline struct memsize_rgn_struct * __init_memblock memsize_get_new_rgn(void)
{
if (memsize_rgn_count == ARRAY_SIZE(memsize_rgn)) {
pr_err("not enough space on memsize_rgn\n");
return NULL;
}
return &memsize_rgn[memsize_rgn_count++];
}
static bool __init_memblock memsize_update_nomap_region(const char *name, phys_addr_t base,
phys_addr_t size, bool nomap)
{
int i;
struct memsize_rgn_struct *rmem_rgn, *new_rgn;
if (!name)
return false;
for (i = 0; i < memsize_rgn_count; i++) {
rmem_rgn = &memsize_rgn[i];
if (!rmem_rgn->nomap)
continue;
if (strcmp(rmem_rgn->name, "unknown"))
continue;
if (base < rmem_rgn->base)
continue;
if (base + size > rmem_rgn->base + rmem_rgn->size)
continue;
if (base == rmem_rgn->base && size == rmem_rgn->size) {
memsize_get_valid_name(rmem_rgn->name, name);
return true;
}
new_rgn = memsize_get_new_rgn();
if (!new_rgn)
return true;
new_rgn->base = base;
new_rgn->size = size;
new_rgn->nomap = nomap;
new_rgn->reusable = false;
memsize_get_valid_name(new_rgn->name, name);
if (base == rmem_rgn->base && size < rmem_rgn->size) {
rmem_rgn->base = base + size;
rmem_rgn->size -= size;
} else if (base + size == rmem_rgn->base + rmem_rgn->size) {
rmem_rgn->size -= size;
} else {
new_rgn = memsize_get_new_rgn();
if (!new_rgn)
return true;
new_rgn->base = base + size;
new_rgn->size = (rmem_rgn->base + rmem_rgn->size)
- (base + size);
new_rgn->nomap = nomap;
new_rgn->reusable = false;
strscpy(new_rgn->name, "unknown", sizeof(new_rgn->name));
rmem_rgn->size = base - rmem_rgn->base;
}
return true;
}
return false;
}
void memblock_memsize_record(const char *name, phys_addr_t base,
phys_addr_t size, bool nomap, bool reusable)
{
@ -2064,11 +2005,7 @@ void memblock_memsize_record(const char *name, phys_addr_t base,
}
memblock_dbg("%s %pa..%pa nomap:%d reusable:%d\n",
__func__, &base, &end, nomap, reusable);
if (memsize_update_nomap_region(name, base, size, nomap))
return;
rgn = memsize_get_new_rgn();
if (!rgn)
return;
rgn = &memsize_rgn[memsize_rgn_count++];
rgn->base = base;
rgn->size = size;
rgn->nomap = nomap;