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Date: Mon, 19 Oct 2015 11:17:43 +0200
From: Borislav Petkov <bp@...en8.de>
To: Ingo Molnar <mingo@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/8] x86/setup: Cleanup crashkernel reservation functions
From: Borislav Petkov <bp@...e.de>
* Shorten variable names
* Realign code, space out for better readability
No code changed:
# arch/x86/kernel/setup.o:
text data bss dec hex filename
4543 3096 69904 77543 12ee7 setup.o.before
4543 3096 69904 77543 12ee7 setup.o.after
md5:
8a1b7c6738a553ca207b56bd84a8f359 setup.o.before.asm
8a1b7c6738a553ca207b56bd84a8f359 setup.o.after.asm
Reviewed-by: Dave Young <dyoung@...hat.com>
Reviewed-by: Joerg Roedel <jroedel@...e.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: jerry_hoemann@...com
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Juergen Gross <jgross@...e.com>
Cc: Mark Salter <msalter@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: WANG Chao <chaowang@...hat.com>
Cc: x86-ml <x86@...nel.org>
Signed-off-by: Borislav Petkov <bp@...e.de>
---
arch/x86/kernel/setup.c | 43 +++++++++++++++++++++----------------------
1 file changed, 21 insertions(+), 22 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 1b36839e41eb..fd9e178aa890 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -486,11 +486,11 @@ static void __init memblock_x86_reserve_range_setup_data(void)
* On 64bit, old kexec-tools need to under 896MiB.
*/
#ifdef CONFIG_X86_32
-# define CRASH_KERNEL_ADDR_LOW_MAX (512 << 20)
-# define CRASH_KERNEL_ADDR_HIGH_MAX (512 << 20)
+# define CRASH_ADDR_LOW_MAX (512 << 20)
+# define CRASH_ADDR_HIGH_MAX (512 << 20)
#else
-# define CRASH_KERNEL_ADDR_LOW_MAX (896UL<<20)
-# define CRASH_KERNEL_ADDR_HIGH_MAX MAXMEM
+# define CRASH_ADDR_LOW_MAX (896UL << 20)
+# define CRASH_ADDR_HIGH_MAX MAXMEM
#endif
static int __init reserve_crashkernel_low(void)
@@ -503,10 +503,10 @@ static int __init reserve_crashkernel_low(void)
bool auto_set = false;
int ret;
- total_low_mem = memblock_mem_size(1UL<<(32-PAGE_SHIFT));
+ total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT));
+
/* crashkernel=Y,low */
- ret = parse_crashkernel_low(boot_command_line, total_low_mem,
- &low_size, &base);
+ ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base);
if (ret != 0) {
/*
* two parts from lib/swiotlb.c:
@@ -517,7 +517,7 @@ static int __init reserve_crashkernel_low(void)
* make sure we allocate enough extra low memory so that we
* don't run out of DMA buffers for 32-bit devices.
*/
- low_size = max(swiotlb_size_or_default() + (8UL<<20), 256UL<<20);
+ low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
auto_set = true;
} else {
/* passed with crashkernel=0,low ? */
@@ -525,9 +525,7 @@ static int __init reserve_crashkernel_low(void)
return 0;
}
- low_base = memblock_find_in_range(low_size, (1ULL<<32),
- low_size, alignment);
-
+ low_base = memblock_find_in_range(low_size, 1ULL << 32, low_size, alignment);
if (!low_base) {
pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
(unsigned long)(low_size >> 20));
@@ -535,10 +533,12 @@ static int __init reserve_crashkernel_low(void)
}
memblock_reserve(low_base, low_size);
+
pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n",
- (unsigned long)(low_size >> 20),
- (unsigned long)(low_base >> 20),
- (unsigned long)(total_low_mem >> 20));
+ (unsigned long)(low_size >> 20),
+ (unsigned long)(low_base >> 20),
+ (unsigned long)(total_low_mem >> 20));
+
crashk_low_res.start = low_base;
crashk_low_res.end = low_base + low_size - 1;
insert_resource(&iomem_resource, &crashk_low_res);
@@ -557,12 +557,11 @@ static void __init reserve_crashkernel(void)
total_mem = memblock_phys_mem_size();
/* crashkernel=XM */
- ret = parse_crashkernel(boot_command_line, total_mem,
- &crash_size, &crash_base);
+ ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
if (ret != 0 || crash_size <= 0) {
/* crashkernel=X,high */
ret = parse_crashkernel_high(boot_command_line, total_mem,
- &crash_size, &crash_base);
+ &crash_size, &crash_base);
if (ret != 0 || crash_size <= 0)
return;
high = true;
@@ -574,10 +573,9 @@ static void __init reserve_crashkernel(void)
* kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
*/
crash_base = memblock_find_in_range(alignment,
- high ? CRASH_KERNEL_ADDR_HIGH_MAX :
- CRASH_KERNEL_ADDR_LOW_MAX,
- crash_size, alignment);
-
+ high ? CRASH_ADDR_HIGH_MAX
+ : CRASH_ADDR_LOW_MAX,
+ crash_size, alignment);
if (!crash_base) {
pr_info("crashkernel reservation failed - No suitable area found.\n");
return;
@@ -587,7 +585,8 @@ static void __init reserve_crashkernel(void)
unsigned long long start;
start = memblock_find_in_range(crash_base,
- crash_base + crash_size, crash_size, 1<<20);
+ crash_base + crash_size,
+ crash_size, 1 << 20);
if (start != crash_base) {
pr_info("crashkernel reservation failed - memory is in use.\n");
return;
--
2.3.5
--
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