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| author | Felix Fietkau <nbd@nbd.name> | 2016-08-11 17:02:32 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2016-08-11 17:02:48 +0200 |
| commit | 9d56ec6244e516fd80f8500aaa081c39ffeccf86 (patch) | |
| tree | 4278a6efad9e781816af63a566c0e9a38ef648be /target/linux/generic/patches-4.4 | |
| parent | fa350d5aba2e65826ab83e01ab28210836c0067f (diff) | |
| download | upstream-9d56ec6244e516fd80f8500aaa081c39ffeccf86.tar.gz upstream-9d56ec6244e516fd80f8500aaa081c39ffeccf86.tar.bz2 upstream-9d56ec6244e516fd80f8500aaa081c39ffeccf86.zip | |
kernel: fix crashlog issues on highmem systems
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/generic/patches-4.4')
| -rw-r--r-- | target/linux/generic/patches-4.4/930-crashlog.patch | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/target/linux/generic/patches-4.4/930-crashlog.patch b/target/linux/generic/patches-4.4/930-crashlog.patch index 311a4f1159..bb97c90196 100644 --- a/target/linux/generic/patches-4.4/930-crashlog.patch +++ b/target/linux/generic/patches-4.4/930-crashlog.patch @@ -43,7 +43,7 @@ --- /dev/null +++ b/kernel/crashlog.c -@@ -0,0 +1,196 @@ +@@ -0,0 +1,209 @@ +/* + * Crash information logger + * Copyright (C) 2010 Felix Fietkau <nbd@nbd.name> @@ -103,40 +103,53 @@ + +extern struct list_head *crashlog_modules; + ++static bool crashlog_set_addr(phys_addr_t addr, phys_addr_t size) ++{ ++ /* Limit to lower 64 MB to avoid highmem */ ++ phys_addr_t limit = 64 * 1024 * 1024; ++ ++ if (crashlog_addr) ++ return false; ++ ++ if (addr > limit) ++ return false; ++ ++ if (addr + size > limit) ++ size = limit - addr; ++ ++ crashlog_addr = addr + size - CRASHLOG_OFFSET; ++ return true; ++} ++ +#ifndef CONFIG_NO_BOOTMEM +void __init crashlog_init_bootmem(bootmem_data_t *bdata) +{ -+ unsigned long addr; ++ phys_addr_t start, end; + -+ if (crashlog_addr) ++ start = PFN_PHYS(bdata->node_low_pfn); ++ end = PFN_PHYS(bdata->node_min_pfn); ++ if (!crashlog_set_addr(start, end - start)) + return; + -+ addr = PFN_PHYS(bdata->node_low_pfn) - CRASHLOG_OFFSET; -+ if (reserve_bootmem(addr, CRASHLOG_SIZE, BOOTMEM_EXCLUSIVE) < 0) { -+ printk("Crashlog failed to allocate RAM at address 0x%lx\n", addr); -+ bdata->node_low_pfn -= CRASHLOG_PAGES; -+ addr = PFN_PHYS(bdata->node_low_pfn); ++ if (reserve_bootmem(crashlog_addr, CRASHLOG_SIZE, BOOTMEM_EXCLUSIVE) < 0) { ++ printk("Crashlog failed to allocate RAM at address 0x%lx\n", ++ crashlog_addr); ++ crashlog_addr = 0; + } -+ crashlog_addr = addr; +} +#endif + +#ifdef CONFIG_HAVE_MEMBLOCK +void __init_memblock crashlog_init_memblock(phys_addr_t addr, phys_addr_t size) +{ -+ if (crashlog_addr) ++ if (!crashlog_set_addr(addr, size)) + return; + -+ if (size <= CRASHLOG_OFFSET + CRASHLOG_SIZE) -+ return; -+ -+ addr += size - CRASHLOG_OFFSET; -+ if (memblock_reserve(addr, CRASHLOG_SIZE)) { -+ printk("Crashlog failed to allocate RAM at address 0x%lx\n", (unsigned long) addr); -+ return; ++ if (memblock_reserve(crashlog_addr, CRASHLOG_SIZE)) { ++ printk("Crashlog failed to allocate RAM at address 0x%lx\n", ++ crashlog_addr); ++ crashlog_addr = 0; + } -+ -+ crashlog_addr = addr; +} +#endif + |