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Commit 99399545 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Fix bug with mmap2 syscall MB implementation 



Fix mmap2 behaviour which incorrectly works with pgoff
not in 4k units.

Reported-by: default avatarRich Felker <dalias@aerifal.cx>
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
parent 176195e7

arch/microblaze/kernel/sys_microblaze.c

+11 −0
Original line number Diff line number Diff line
@@ -42,3 +42,14 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, 


	return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);

}



SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,

		unsigned long, prot, unsigned long, flags, unsigned long, fd,

		unsigned long, pgoff)

{

	if (pgoff & (~PAGE_MASK >> 12))

		return -EINVAL;



	return sys_mmap_pgoff(addr, len, prot, flags, fd,

			      pgoff >> (PAGE_SHIFT - 12));

}

arch/microblaze/kernel/syscall_table.S

+1 −1
Original line number Diff line number Diff line
@@ -192,7 +192,7 @@ ENTRY(sys_call_table) 
	.long sys_ni_syscall		/* reserved for streams2 */

	.long sys_vfork		/* 190 */

	.long sys_getrlimit

	.long sys_mmap_pgoff		/* mmap2 */

	.long sys_mmap2

	.long sys_truncate64

	.long sys_ftruncate64

	.long sys_stat64		/* 195 */