diff options
Diffstat (limited to 'meta-openembedded/meta-initramfs/recipes-kernel/kexec/kexec-tools-klibc/0005-crashdump-elf.c-work-around-for-sysconf-_SC_NPROCESS.patch')
-rw-r--r-- | meta-openembedded/meta-initramfs/recipes-kernel/kexec/kexec-tools-klibc/0005-crashdump-elf.c-work-around-for-sysconf-_SC_NPROCESS.patch | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/meta-openembedded/meta-initramfs/recipes-kernel/kexec/kexec-tools-klibc/0005-crashdump-elf.c-work-around-for-sysconf-_SC_NPROCESS.patch b/meta-openembedded/meta-initramfs/recipes-kernel/kexec/kexec-tools-klibc/0005-crashdump-elf.c-work-around-for-sysconf-_SC_NPROCESS.patch new file mode 100644 index 0000000000..4f7506d44c --- /dev/null +++ b/meta-openembedded/meta-initramfs/recipes-kernel/kexec/kexec-tools-klibc/0005-crashdump-elf.c-work-around-for-sysconf-_SC_NPROCESS.patch @@ -0,0 +1,134 @@ +From 1cfee75d9662c3382bb7cb8f1c952333837598ae Mon Sep 17 00:00:00 2001 +From: Andrea Adami <andrea.adami@gmail.com> +Date: Wed, 18 Apr 2018 02:21:30 +0200 +Subject: [PATCH] crashdump-elf.c: work around for _SC_NPROCESSORS_CONF + +klibc sysconf lacks this so the implementation +of Linus Torvalds was taken (simplified): + +https://sourceware.org/ml/libc-alpha/2011-06/msg00079.html + +Have fun reding the thread! + +Fix + + crashdump-elf.c:117:21: error: '_SC_NPROCESSORS_CONF' undeclared + +Upstream-Status: Inappropriate [klibc specific] +Signed-off-by: Andrea Adami <andrea.adami@gmail.com> + +--- + kexec/crashdump-elf.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 92 insertions(+) + +diff --git a/kexec/crashdump-elf.c b/kexec/crashdump-elf.c +index b8bb686..7e6767c 100644 +--- a/kexec/crashdump-elf.c ++++ b/kexec/crashdump-elf.c +@@ -25,6 +25,94 @@ do { \ + } while(0) + #endif + ++#ifdef __KLIBC__ ++#ifndef KLIBC_SYSFS_CPU_H ++#define KLIBC_SYSFS_CPU_H ++ ++ ++static int __get_sysfs_cpus(const char *path); ++int __get_nprocs (void); ++int __get_nprocs_conf (void); ++ ++ ++ ++static int __get_sysfs_cpus(const char *path) ++{ ++ FILE *file; ++ int nr_cpus = 0; ++ int prev = -1; ++ char *p; ++ char line[10]; ++ ++ ++ file = fopen(path, "r"); ++ if (!file) ++ return -1; ++ for (;;) { ++ char sep; ++ int cpu; ++ int n; ++ ++ /* int n = fscanf(file, "%u%c", &cpu, &sep); */ ++ p = fgets(line, sizeof(line), file); ++ if (p == NULL) ++ return -1; ++ else ++ n = sscanf(line, "%u%c", &cpu, &sep); ++ ++ if (n <= 0) ++ break; ++ ++ /* EOF == EOLN */ ++ if (n == 1) ++ sep = '\n'; ++ ++ /* Was the previous CPU a range? */ ++ if (prev >= 0) { ++ nr_cpus += cpu - prev + 1; ++ prev = -1; ++ } else if (sep == '-') ++ prev = cpu; ++ else ++ nr_cpus++; ++ ++ if (sep == '\n') ++ break; ++ } ++ fclose(file); ++ return nr_cpus; ++} ++ ++int __get_nprocs () ++{ ++ long ret; ++ static int cached = -1; ++ ++ ret = cached; ++ if (ret < 0) ++ { ++ ret = __get_sysfs_cpus("/sys/devices/system/cpu/online"); ++ cached = ret; ++ } ++ return ret; ++} ++ ++int __get_nprocs_conf () ++{ ++ long ret; ++ static int cached = -1; ++ ++ ret = cached; ++ if (ret < 0) ++ { ++ ret = __get_sysfs_cpus("/sys/devices/system/cpu/possible"); ++ cached = ret; ++ } ++ return ret; ++} ++#endif ++#endif ++ + /* Prepares the crash memory headers and stores in supplied buffer. */ + int FUNC(struct kexec_info *info, + struct crash_elf_info *elf_info, +@@ -46,7 +134,11 @@ int FUNC(struct kexec_info *info, + if (xen_present()) + nr_cpus = xen_get_nr_phys_cpus(); + else ++#ifndef __KLIBC__ + nr_cpus = sysconf(_SC_NPROCESSORS_CONF); ++#else ++ nr_cpus = __get_nprocs_conf(); ++#endif + + if (nr_cpus < 0) { + return -1; |