android/android_kernel_xiaomi_sm8450
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Revert "Revert "fs: Allow a NULL pos pointer to __kernel_write""

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This reverts commit e4a15e8dac.

Bug: 171770067
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I27032f9ebe8fcddd98416ddabe34f554db545eae
This commit is contained in:
Greg Kroah-Hartman 2020-10-28 15:07:57 +01:00
parent 6f0863e73b
commit a3cb2e4ce4
1 changed files with 3 additions and 2 deletions
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5
fs/read_write.c
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@ -544,11 +544,12 @@ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t
return warn_unsupported(file, "write");
init_sync_kiocb(&kiocb, file);
kiocb.ki_pos = *pos;
kiocb.ki_pos = pos ? *pos : 0;
iov_iter_kvec(&iter, WRITE, &iov, 1, iov.iov_len);
ret = file->f_op->write_iter(&kiocb, &iter);
if (ret > 0) {
*pos = kiocb.ki_pos;
if (pos)
*pos = kiocb.ki_pos;
fsnotify_modify(file);
add_wchar(current, ret);
}