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x86/boot: Fix -Wint-to-pointer-cast build warning

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Fix this warning when building 32-bit with

CONFIG_RANDOMIZE_BASE=y
CONFIG_MEMORY_HOTREMOVE=y

  arch/x86/boot/compressed/acpi.c:316:9: warning: \
    cast to pointer from integer of different size [-Wint-to-pointer-cast]

Have get_cmdline_acpi_rsdp() return unsigned long which is the proper
type to convert to a pointer of the respective width.

 [ bp: Rewrite commit message, touch ups. ]

Signed-off-by: Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/1587645588-7130-3-git-send-email-vamshi.k.sthambamkadi@gmail.com
This commit is contained in:
Vamshi K Sthambamkadi 2020-04-23 18:09:48 +05:30 • committed by Borislav Petkov
parent 5fafbebc86
commit 40ba9309c7
1 changed files with 3 additions and 4 deletions
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7
arch/x86/boot/compressed/acpi.c
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@ -280,9 +280,9 @@ acpi_physical_address get_rsdp_addr(void)
*/
#define MAX_ADDR_LEN 19
static acpi_physical_address get_cmdline_acpi_rsdp(void)
static unsigned long get_cmdline_acpi_rsdp(void)
{
acpi_physical_address addr = 0;
unsigned long addr = 0;
#ifdef CONFIG_KEXEC
char val[MAX_ADDR_LEN] = { };
@ -292,7 +292,7 @@ static acpi_physical_address get_cmdline_acpi_rsdp(void)
if (ret < 0)
return 0;
if (kstrtoull(val, 16, &addr))
if (boot_kstrtoul(val, 16, &addr))
return 0;
#endif
return addr;
@ -314,7 +314,6 @@ static unsigned long get_acpi_srat_table(void)
* different ideas about whether to trust a command-line parameter.
*/
rsdp = (struct acpi_table_rsdp *)get_cmdline_acpi_rsdp();
if (!rsdp)
rsdp = (struct acpi_table_rsdp *)(long)
boot_params->acpi_rsdp_addr;