Messages in this thread Patch in this message | | | Date | Sat, 05 Dec 2009 19:08:50 +0000 | Subject | [RFC][PATCH 8/18] file ->get_unmapped_area() shouldn't duplicate work of get_unmapped_area() | From | Al Viro <> |
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... we should call mm ->get_unmapped_area() instead and let our caller do the final checks.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- arch/sparc/kernel/sys_sparc_64.c | 10 +++++++--- ipc/shm.c | 2 +- 2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index ddda12f..d498b32 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -317,10 +317,14 @@ bottomup: unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) { unsigned long align_goal, addr = -ENOMEM; + unsigned long (*get_area)(struct file *, unsigned long, + unsigned long, unsigned long, unsigned long); + + get_area = current->mm->get_unmapped_area; if (flags & MAP_FIXED) { /* Ok, don't mess with it. */ - return get_unmapped_area(NULL, orig_addr, len, pgoff, flags); + return get_area(NULL, orig_addr, len, pgoff, flags); } flags &= ~MAP_SHARED; @@ -333,7 +337,7 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, u align_goal = (64UL * 1024); do { - addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); + addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); if (!(addr & ~PAGE_MASK)) { addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); break; @@ -351,7 +355,7 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, u * be obtained. */ if (addr & ~PAGE_MASK) - addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags); + addr = get_area(NULL, orig_addr, len, pgoff, flags); return addr; } diff --git a/ipc/shm.c b/ipc/shm.c index 464694e..7e50727 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -290,7 +290,7 @@ static unsigned long shm_get_unmapped_area(struct file *file, unsigned long flags) { struct shm_file_data *sfd = shm_file_data(file); - return get_unmapped_area(sfd->file, addr, len, pgoff, flags); + return current->mm->get_unmapped_area(sfd->file, addr, len, pgoff, flags); } int is_file_shm_hugepages(struct file *file) -- 1.5.6.5
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