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author | Hari Bathini <hbathini@linux.vnet.ibm.com> | 2017-05-08 15:56:18 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-08 17:15:11 -0700 |
commit | 692f66f26a4c19d73249736aa973c13a1521b387 (patch) | |
tree | 773e4e79690d71c62e345ed37246f94ddbe0fdf6 /include/linux/printk.h | |
parent | c311c797998c1e70eade463dd60b843da4f1a203 (diff) | |
download | linux-stable-692f66f26a4c19d73249736aa973c13a1521b387.tar.gz linux-stable-692f66f26a4c19d73249736aa973c13a1521b387.tar.bz2 linux-stable-692f66f26a4c19d73249736aa973c13a1521b387.zip |
crash: move crashkernel parsing and vmcore related code under CONFIG_CRASH_CORE
Patch series "kexec/fadump: remove dependency with CONFIG_KEXEC and
reuse crashkernel parameter for fadump", v4.
Traditionally, kdump is used to save vmcore in case of a crash. Some
architectures like powerpc can save vmcore using architecture specific
support instead of kexec/kdump mechanism. Such architecture specific
support also needs to reserve memory, to be used by dump capture kernel.
crashkernel parameter can be a reused, for memory reservation, by such
architecture specific infrastructure.
This patchset removes dependency with CONFIG_KEXEC for crashkernel
parameter and vmcoreinfo related code as it can be reused without kexec
support. Also, crashkernel parameter is reused instead of
fadump_reserve_mem to reserve memory for fadump.
The first patch moves crashkernel parameter parsing and vmcoreinfo
related code under CONFIG_CRASH_CORE instead of CONFIG_KEXEC_CORE. The
second patch reuses the definitions of append_elf_note() & final_note()
functions under CONFIG_CRASH_CORE in IA64 arch code. The third patch
removes dependency on CONFIG_KEXEC for firmware-assisted dump (fadump)
in powerpc. The next patch reuses crashkernel parameter for reserving
memory for fadump, instead of the fadump_reserve_mem parameter. This
has the advantage of using all syntaxes crashkernel parameter supports,
for fadump as well. The last patch updates fadump kernel documentation
about use of crashkernel parameter.
This patch (of 5):
Traditionally, kdump is used to save vmcore in case of a crash. Some
architectures like powerpc can save vmcore using architecture specific
support instead of kexec/kdump mechanism. Such architecture specific
support also needs to reserve memory, to be used by dump capture kernel.
crashkernel parameter can be a reused, for memory reservation, by such
architecture specific infrastructure.
But currently, code related to vmcoreinfo and parsing of crashkernel
parameter is built under CONFIG_KEXEC_CORE. This patch introduces
CONFIG_CRASH_CORE and moves the above mentioned code under this config,
allowing code reuse without dependency on CONFIG_KEXEC. There is no
functional change with this patch.
Link: http://lkml.kernel.org/r/149035338104.6881.4550894432615189948.stgit@hbathini.in.ibm.com
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/printk.h')
-rw-r--r-- | include/linux/printk.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index 571257e0f53d..e10f27468322 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -198,7 +198,7 @@ extern void wake_up_klogd(void); char *log_buf_addr_get(void); u32 log_buf_len_get(void); -void log_buf_kexec_setup(void); +void log_buf_vmcoreinfo_setup(void); void __init setup_log_buf(int early); __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...); void dump_stack_print_info(const char *log_lvl); @@ -246,7 +246,7 @@ static inline u32 log_buf_len_get(void) return 0; } -static inline void log_buf_kexec_setup(void) +static inline void log_buf_vmcoreinfo_setup(void) { } |