From 0dea04b288c06654b0de3563c5b8cdfe6130e450 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Mon, 26 Mar 2018 15:34:47 +0530 Subject: [PATCH] powerpc/mm/slice: Consolidate return path in slice_get_unmapped_area() In a following patch, on finding a free area we will need to do allocatinon of extra contexts as needed. Consolidating the return path for slice_get_unmapped_area() will make that easier. Split into a separate patch to make review easy. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- arch/powerpc/mm/slice.c | 36 ++++++++++++++++++++---------------- 1 file changed, 20 insertions(+), 16 deletions(-) diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c index 1297b3ad7dd2..09ac1a709d0c 100644 --- a/arch/powerpc/mm/slice.c +++ b/arch/powerpc/mm/slice.c @@ -574,7 +574,8 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, */ if (slice_check_range_fits(mm, &good_mask, addr, len)) { slice_dbg(" fits good !\n"); - return addr; + newaddr = addr; + goto return_addr; } } else { /* Now let's see if we can find something in the existing @@ -587,7 +588,7 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, * we thus return directly */ slice_dbg(" found area at 0x%lx\n", newaddr); - return newaddr; + goto return_addr; } } /* @@ -601,6 +602,7 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, if (addr != 0 || fixed) { if (slice_check_range_fits(mm, &potential_mask, addr, len)) { slice_dbg(" fits potential !\n"); + newaddr = addr; goto convert; } } @@ -615,34 +617,34 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, * anywhere in the good area. */ if (addr) { - addr = slice_find_area(mm, len, &good_mask, - psize, topdown, high_limit); - if (addr != -ENOMEM) { - slice_dbg(" found area at 0x%lx\n", addr); - return addr; + newaddr = slice_find_area(mm, len, &good_mask, + psize, topdown, high_limit); + if (newaddr != -ENOMEM) { + slice_dbg(" found area at 0x%lx\n", newaddr); + goto return_addr; } } /* Now let's see if we can find something in the existing slices * for that size plus free slices */ - addr = slice_find_area(mm, len, &potential_mask, - psize, topdown, high_limit); + newaddr = slice_find_area(mm, len, &potential_mask, + psize, topdown, high_limit); #ifdef CONFIG_PPC_64K_PAGES - if (addr == -ENOMEM && psize == MMU_PAGE_64K) { + if (newaddr == -ENOMEM && psize == MMU_PAGE_64K) { /* retry the search with 4k-page slices included */ slice_or_mask(&potential_mask, &potential_mask, compat_maskp); - addr = slice_find_area(mm, len, &potential_mask, - psize, topdown, high_limit); + newaddr = slice_find_area(mm, len, &potential_mask, + psize, topdown, high_limit); } #endif - if (addr == -ENOMEM) + if (newaddr == -ENOMEM) return -ENOMEM; - slice_range_to_mask(addr, len, &potential_mask); - slice_dbg(" found potential area at 0x%lx\n", addr); + slice_range_to_mask(newaddr, len, &potential_mask); + slice_dbg(" found potential area at 0x%lx\n", newaddr); slice_print_mask(" mask", &potential_mask); convert: @@ -656,7 +658,9 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, if (psize > MMU_PAGE_BASE) on_each_cpu(slice_flush_segments, mm, 1); } - return addr; + +return_addr: + return newaddr; } EXPORT_SYMBOL_GPL(slice_get_unmapped_area); -- 2.11.0