mips, crash: wrap crash dumping code into crash related ifdefs

Now crash codes under kernel/ folder has been split out from kexec
code, crash dumping can be separated from kexec reboot in config
items on mips with some adjustments.

Here use IS_ENABLED(CONFIG_CRASH_RESERVE) check to decide if compiling
in the crashkernel reservation code.

Link: https://lkml.kernel.org/r/20240124051254.67105-12-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Pingfan Liu <piliu@redhat.com>
Cc: Klara Modin <klarasmodin@gmail.com>
Cc: Michael Kelley <mhklinux@outlook.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 9c30de1..12a1a4f 100644 (file)
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -442,8 +442,6 @@ static void __init mips_reserve_vmcore(void)
 #endif
 }
 
-#ifdef CONFIG_KEXEC
-
 /* 64M alignment for crash kernel regions */
 #define CRASH_ALIGN    SZ_64M
 #define CRASH_ADDR_MAX SZ_512M
@@ -454,6 +452,9 @@ static void __init mips_parse_crashkernel(void)
        unsigned long long crash_size, crash_base;
        int ret;
 
+       if (!IS_ENABLED(CONFIG_CRASH_RESERVE))
+               return;
+
        total_mem = memblock_phys_mem_size();
        ret = parse_crashkernel(boot_command_line, total_mem,
                                &crash_size, &crash_base,
@@ -489,6 +490,9 @@ static void __init request_crashkernel(struct resource *res)
 {
        int ret;
 
+       if (!IS_ENABLED(CONFIG_CRASH_RESERVE))
+               return;
+
        if (crashk_res.start == crashk_res.end)
                return;
 
@@ -498,15 +502,6 @@ static void __init request_crashkernel(struct resource *res)
                        (unsigned long)(resource_size(&crashk_res) >> 20),
                        (unsigned long)(crashk_res.start  >> 20));
 }
-#else /* !defined(CONFIG_KEXEC)                */
-static void __init mips_parse_crashkernel(void)
-{
-}
-
-static void __init request_crashkernel(struct resource *res)
-{
-}
-#endif /* !defined(CONFIG_KEXEC)  */
 
 static void __init check_kernel_sections_mem(void)
 {