diff options
| author | Oscar Salvador <osalvador@suse.de> | 2024-10-07 09:50:30 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-11-07 05:11:09 +0100 |
| commit | 7d7dba7f6891addedeb894e6f74b46177900874c (patch) | |
| tree | ba847c9573b28172c14b5a2f7b5a36ae876bfcc8 /arch/s390 | |
| parent | mm/mmap: teach generic_get_unmapped_area{_topdown} to handle hugetlb mappings (diff) | |
| download | linux-7d7dba7f6891addedeb894e6f74b46177900874c.tar.xz linux-7d7dba7f6891addedeb894e6f74b46177900874c.zip | |
arch/s390: teach arch_get_unmapped_area{_topdown} to handle hugetlb mappings
We want to stop special casing hugetlb mappings and make them go through
generic channels, so teach arch_get_unmapped_area{_topdown} to handle
those.
s390 specific hugetlb function does not set info.align_offset, so do the
same here for compatibility.
Link: https://lkml.kernel.org/r/20241007075037.267650-3-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Peter Xu <peterx@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/mm/mmap.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c index 96efa061ce01..33f3504be90b 100644 --- a/arch/s390/mm/mmap.c +++ b/arch/s390/mm/mmap.c @@ -17,6 +17,7 @@ #include <linux/random.h> #include <linux/compat.h> #include <linux/security.h> +#include <linux/hugetlb.h> #include <asm/elf.h> static unsigned long stack_maxrandom_size(void) @@ -73,6 +74,8 @@ static inline unsigned long mmap_base(unsigned long rnd, static int get_align_mask(struct file *filp, unsigned long flags) { + if (filp && is_file_hugepages(filp)) + return huge_page_mask_align(filp); if (!(current->flags & PF_RANDOMIZE)) return 0; if (filp || (flags & MAP_SHARED)) @@ -106,7 +109,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, info.low_limit = mm->mmap_base; info.high_limit = TASK_SIZE; info.align_mask = get_align_mask(filp, flags); - info.align_offset = pgoff << PAGE_SHIFT; + if (!(filp && is_file_hugepages(filp))) + info.align_offset = pgoff << PAGE_SHIFT; addr = vm_unmapped_area(&info); if (offset_in_page(addr)) return addr; @@ -144,7 +148,8 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long ad info.low_limit = PAGE_SIZE; info.high_limit = mm->mmap_base; info.align_mask = get_align_mask(filp, flags); - info.align_offset = pgoff << PAGE_SHIFT; + if (!(filp && is_file_hugepages(filp))) + info.align_offset = pgoff << PAGE_SHIFT; addr = vm_unmapped_area(&info); /* |