[patch] new aop block_write_begin fix

After we enter to block_write_begin with *pagep == NULL and some page was grabed we remember this page in *pagep And if __block_prepare_write() we have to clear *pagep , as it was before. Because this may confuse caller. for example caller may have folowing

[patch] new aop block_write_begin fix

After we enter to block_write_begin with *pagep == NULL and some page was grabed we remember this page in *pagep And if __block_prepare_write() we have to clear *pagep , as it was before. Because this may confuse caller. for example caller may have folowing