Comment 0 for bug 1847432

Compiling Bionic 4.15 linux-raspi2 yields:

In file included from ./include/linux/kernel.h:14:0,
                 from ./include/linux/delay.h:22,
                 from drivers/mmc/host/bcm2835-sdhost.c:35:
drivers/mmc/host/bcm2835-sdhost.c: In function 'log_init':
./include/linux/kern_levels.h:5:18: warning: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'dma_addr_t {aka long long unsigned int}' [-Wformat=]
 #define KERN_SOH "\001" /* ASCII Start Of Header */
                  ^
./include/linux/printk.h:309:9: note: in definition of macro 'pr_printk_hash'
  printk(level pr_fmt(format), ##__VA_ARGS__)
         ^~~~~
./include/linux/kern_levels.h:14:19: note: in expansion of macro 'KERN_SOH'
 #define KERN_INFO KERN_SOH "6" /* informational */
                   ^~~~~~~~
./include/linux/printk.h:333:17: note: in expansion of macro 'KERN_INFO'
  pr_printk_hash(KERN_INFO, fmt, ##__VA_ARGS__)
                 ^~~~~~~~~
drivers/mmc/host/bcm2835-sdhost.c:249:3: note: in expansion of macro 'pr_info'
   pr_info("sdhost: log_buf @ %p (%x)\n",
   ^~~~~~~
drivers/mmc/host/bcm2835-sdhost.c:249:35: note: format string is defined here
   pr_info("sdhost: log_buf @ %p (%x)\n",
                                  ~^
                                  %llx
drivers/mmc/host/bcm2835-sdhost.c: In function 'bcm2835_sdhost_dma_complete':
drivers/mmc/host/bcm2835-sdhost.c:530:20: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  log_event("DMA<", (u32)host->data, bcm2835_sdhost_read(host, SDHSTS));
                    ^
[SNIP]