From a6304272b03ece97346f16923453f7e36ec19a5a Mon Sep 17 00:00:00 2001 From: Baoquan He Date: Thu, 14 Sep 2023 11:31:34 +0800 Subject: crash_core.c: remove unnecessary parameter of function Patch series "kdump: use generic functions to simplify crashkernel reservation in arch", v3. In the current arm64, crashkernel=,high support has been finished after several rounds of posting and careful reviewing. The code in arm64 which parses crashkernel kernel parameters firstly, then reserve memory can be a good example for other ARCH to refer to. Whereas in x86_64, the code mixing crashkernel parameter parsing and memory reserving is twisted, and looks messy. Refactoring the code to make it more readable maintainable is necessary. Here, firstly abstract the crashkernel parameter parsing code into parse_crashkernel() to make it be able to parse crashkernel=,high|low. Then abstract the crashkernel memory reserving code into a generic function reserve_crashkernel_generic(). Finally, in ARCH which crashkernel=,high support is needed, a simple arch_reserve_crashkernel() can be added to call above two functions. This can remove the duplicated implmentation code in each ARCH, like arm64, x86_64 and riscv. crashkernel=512M,high crashkernel=512M,high crashkernel=256M,low crashkernel=512M,high crashkernel=0M,low crashkernel=0M,high crashkernel=256M,low crashkernel=512M crashkernel=512M@0x4f000000 crashkernel=1G-4G:256M,4G-64G:320M,64G-:576M crashkernel=0M This patch (of 9): In all call sites of __parse_crashkernel(), the parameter 'name' is hardcoded as "crashkernel=". So remove the unnecessary parameter 'name', add local varibale 'name' inside __parse_crashkernel() instead. Link: https://lkml.kernel.org/r/20230914033142.676708-1-bhe@redhat.com Link: https://lkml.kernel.org/r/20230914033142.676708-2-bhe@redhat.com Signed-off-by: Baoquan He Reviewed-by: Zhen Lei Cc: Catalin Marinas Cc: Chen Jiahao Cc: Zhen Lei Signed-off-by: Andrew Morton --- kernel/crash_core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'kernel/crash_core.c') diff --git a/kernel/crash_core.c b/kernel/crash_core.c index 2f675ef045d4..507113932aa9 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -248,11 +248,11 @@ static int __init __parse_crashkernel(char *cmdline, unsigned long long system_ram, unsigned long long *crash_size, unsigned long long *crash_base, - const char *name, const char *suffix) { char *first_colon, *first_space; char *ck_cmdline; + char *name = "crashkernel="; BUG_ON(!crash_size || !crash_base); *crash_size = 0; @@ -290,7 +290,7 @@ int __init parse_crashkernel(char *cmdline, unsigned long long *crash_base) { return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, - "crashkernel=", NULL); + NULL); } int __init parse_crashkernel_high(char *cmdline, @@ -299,7 +299,7 @@ int __init parse_crashkernel_high(char *cmdline, unsigned long long *crash_base) { return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, - "crashkernel=", suffix_tbl[SUFFIX_HIGH]); + suffix_tbl[SUFFIX_HIGH]); } int __init parse_crashkernel_low(char *cmdline, @@ -308,7 +308,7 @@ int __init parse_crashkernel_low(char *cmdline, unsigned long long *crash_base) { return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, - "crashkernel=", suffix_tbl[SUFFIX_LOW]); + suffix_tbl[SUFFIX_LOW]); } /* -- cgit v1.2.3-59-g8ed1b