Commit 43d86ec9 authored by Gao Xiang's avatar Gao Xiang
Browse files

erofs: use poison pointer to replace the hard-coded address 



It's safer and cleaner to replace such hard-coded illegal pointer
with poison pointers.

Signed-off-by: default avatarGao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: default avatarYue Hu <huyue2@coolpad.com>
Link: https://lore.kernel.org/r/20230526201459.128169-7-hsiangkao@linux.alibaba.com
parent 7674a42f

fs/erofs/zdata.c

+1 −3
Original line number Diff line number Diff line
@@ -91,10 +91,8 @@ struct z_erofs_pcluster { 
	struct z_erofs_bvec compressed_bvecs[];

};



/* let's avoid the valid 32-bit kernel addresses */



/* the end of a chain of pclusters */

#define Z_EROFS_PCLUSTER_TAIL           ((void *)0x5F0ECAFE)

#define Z_EROFS_PCLUSTER_TAIL           ((void *) 0x700 + POISON_POINTER_DELTA)

#define Z_EROFS_PCLUSTER_NIL            (NULL)



struct z_erofs_decompressqueue {