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117 struct page *page; 118 void *fsdata; 119 u8 bits; 120 CLST vcn, lcn, clen; 121 122 if (is_sparsed(ni)) { 123 bits = sbi->cluster_bits; 124 vcn = pos >> bits; 125 126 err = attr_data_get_block(ni, vcn, 0, &lcn, &clen, 127 NULL); 128 if (err) 129 goto out; 130 131 if (lcn == SPARSE_LCN) { 132 loff_t vbo = (loff_t)vcn << bits; 133 loff_t to = vbo + ((loff_t)clen << bits); 134 135 if (to <= new_valid) { 136 ni->i_valid = to; 137 pos = to; 138 goto next; 139 } 140 141 if (vbo < pos) { 142 pos = vbo; 143 } else { 144 to = (new_valid >> bits) << bits; 145 if (pos < to) { 146 ni->i_valid = to; 147 pos = to; 148 goto next; 149 } 150 } 151 } 152 } 153 154 zerofrom = pos & (PAGE_SIZE - 1); 155 len = PAGE_SIZE - zerofrom; 156 157 if (pos + len > new_valid) 158 len = new_valid - pos; 159 160 err = ntfs_write_begin(file, mapping, pos, len, &page, &fsdata); 161 if (err) 162 goto out; 163 164 zero_user_segment(page, zerofrom, PAGE_SIZE); 165 166 /* This function in any case puts page. */ 167 err = ntfs_write_end(file, mapping, pos, len, len, page, --> 168 fsdata); "fsdata" is never initialized or used. 169 if (err < 0) 170 goto out; 171 pos += len; 172 regards, dan carpenter