Change in coreboot[master]: cpu/x86/smm: Fix u32 type mismatch in print statement

[Paul Menzel (Code Review)]

Attention is currently required from: Paul Menzel, Rocky Phagura, Arthur Heymans, Werner Zeh.
Hello build bot (Jenkins), Rocky Phagura, Arthur Heymans,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/54343

to look at the new patch set (#5).

Change subject: cpu/x86/smm: Fix u32 type mismatch in print statement
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cpu/x86/smm: Fix u32 type mismatch in print statement

The 64-bit compiler x86_64-linux-gnu-gcc-10 aborts the build with the
format warning below:

CC         ramstage/cpu/x86/smm/smm_module_loader.o
    src/cpu/x86/smm/smm_module_loader.c:415:42: error: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 'u32' {aka 'unsigned int'} [-Werror=format=]
      415 |  printk(BIOS_DEBUG, "%s: stack_end = 0x%lx\n",
          |                                        ~~^
          |                                          |
          |                                          long unsigned int
          |                                        %x
      416 |   __func__, stub_params->stack_top - total_stack_size);
          |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          |                                    |
          |                                    u32 {aka unsigned int}

The size of `int` differs between i386-elf (32-bit) and
x86_64-elf/x86_64-linux-gnu (64-bit).

Unfortunately, coreboot hardcodes

src/include/inttypes.h:#define PRIx32  "x"

so `PRIx32` cannot be used.

Therefore, implicitly cast the value, and introduce a new variable.
`total_stack_size` is only used in the print statement, and can be
replaced.

Found-by: x86_64-linux-gnu-gcc-10 (Debian 10.2.1-6) 10.2.1 20210110
Fixes: afb7a814 ("cpu/x86/smm: Introduce SMM module loader version 2")
Change-Id: Ib504bc5e5b19f62d4702b7f485522a2ee3d26685
Signed-off-by: Paul Menzel 
---
M src/cpu/x86/smm/smm_module_loader.c
1 file changed, 3 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/43/54343/5