From: Mike Rapoport <rppt@xxxxxxxxxxxxx> Subject: openrisc: simplify pte_alloc_one_kernel() The pte_alloc_one_kernel() function allocates a page using __get_free_page(GFP_KERNEL) when mm initialization is complete and memblock_phys_alloc() on the earlier stages. The physical address of the page allocated with memblock_phys_alloc() is converted to the virtual address and in the both cases the allocated page is cleared using clear_page(). The code is simplified by replacing __get_free_page() with get_zeroed_page() and by replacing memblock_phys_alloc() with memblock_alloc(). Link: http://lkml.kernel.org/r/1546248566-14910-5-git-send-email-rppt@xxxxxxxxxxxxx Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> Acked-by: Stafford Horne <shorne@xxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Greentime Hu <green.hu@xxxxxxxxx> Cc: Guan Xuetao <gxt@xxxxxxxxxx> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Jonas Bonn <jonas@xxxxxxxxxxxx> Cc: Mark Salter <msalter@xxxxxxxxxx> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxx> Cc: Michal Simek <michal.simek@xxxxxxxxxx> Cc: Michal Simek <monstr@xxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Rich Felker <dalias@xxxxxxxx> Cc: Russell King <linux@xxxxxxxxxxxxxxx> Cc: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx> Cc: Vincent Chen <deanbo422@xxxxxxxxx> Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- --- a/arch/openrisc/mm/ioremap.c~openrisc-simplify-pte_alloc_one_kernel +++ a/arch/openrisc/mm/ioremap.c @@ -122,13 +122,10 @@ pte_t __ref *pte_alloc_one_kernel(struct { pte_t *pte; - if (likely(mem_init_done)) { - pte = (pte_t *) __get_free_page(GFP_KERNEL); - } else { - pte = (pte_t *) __va(memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE)); - } + if (likely(mem_init_done)) + pte = (pte_t *)get_zeroed_page(GFP_KERNEL); + else + pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE); - if (pte) - clear_page(pte); return pte; } _
