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lx_emul: handle page refcount

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Josef Söntgen 2022-03-17 17:10:27 +01:00 committed by Christian Helmuth
parent 4474460377
commit fd8df3a623
1 changed files with 5 additions and 0 deletions
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5
repos/dde_linux/src/lib/lx_emul/shadow/mm/page_alloc.c
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@ -46,6 +46,9 @@ void __free_pages(struct page * page, unsigned int order)
unsigned const num_pages = (1 << order); unsigned const num_pages = (1 << order);
void * const virt_addr = page->virtual; void * const virt_addr = page->virtual;
if (atomic_read(&page->_refcount) && !atomic_dec_and_test(&page->_refcount))
return;
for (i = 0; i < num_pages; i++) for (i = 0; i < num_pages; i++)
lx_emul_disassociate_page_from_virt_addr(page[i].virtual); lx_emul_disassociate_page_from_virt_addr(page[i].virtual);
@ -66,6 +69,8 @@ struct page * __alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
void const *ptr = lx_emul_mem_alloc_aligned(PAGE_SIZE*nr_pages, PAGE_SIZE); void const *ptr = lx_emul_mem_alloc_aligned(PAGE_SIZE*nr_pages, PAGE_SIZE);
struct page *page = lx_emul_virt_to_pages(ptr, nr_pages); struct page *page = lx_emul_virt_to_pages(ptr, nr_pages);
atomic_set(&page->_refcount, 1);
return page; return page;
} }
#endif #endif