Hello,
I am porting an filesystem from Linux kernel 4.4 to 4.5 and I hit the line:
BUG_ON(mapping_gfp_mask(mapping) & __GFP_HIGHMEM);
in fs/namei.c page_get_link() line 4612.
To begin with I simply switched from .follow_link to .get_link in struct
inode_operations and from page_follow_link_light to page_get_link in our local
function shown below.
Do you have any advice on how to continue debugging this?
/Bo Branten
The local follow_link/get_link function:
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
static void *
nnpfs_follow_link (struct dentry *dentry,
struct nameidata *nd)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
static const char *
nnpfs_follow_link (struct dentry *dentry,
void **page)
#else
static const char *
nnpfs_get_link (struct dentry *dentry,
struct inode *inode,
struct delayed_call *done)
#endif
{
int error = 0;
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
struct inode *inode = DENTRY_TO_INODE(dentry);
#endif
NNPFSDEB(XDEBVNOPS, ("nnpfs_follow_link\n"));
error = nnpfs_data_valid(inode, NNPFS_DATA_R, 0, i_size_read(inode));
if (error)
return ERR_PTR(error);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
return page_follow_link_light(dentry, nd);
#elif LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
return page_follow_link_light(dentry, page);
#else
return page_get_link(dentry, inode, done);
#endif
}
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