diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpu-Change-type-of-x86_cache_size-variable-to-un.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpu-Change-type-of-x86_cache_size-variable-to-un.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpu-Change-type-of-x86_cache_size-variable-to-un.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpu-Change-type-of-x86_cache_size-variable-to-un.patch new file mode 100644 index 00000000..68e82a01 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpu-Change-type-of-x86_cache_size-variable-to-un.patch @@ -0,0 +1,72 @@ +From 5d671cb212c75a4adebb52863b5e9d370c8c23c1 Mon Sep 17 00:00:00 2001 +From: "Gustavo A. R. Silva" <garsilva@embeddedor.com> +Date: Tue, 13 Feb 2018 13:22:08 -0600 +Subject: [PATCH 10/12] x86/cpu: Change type of x86_cache_size variable to + unsigned int + +commit 24dbc6000f4b9b0ef5a9daecb161f1907733765a upstream. + +Currently, x86_cache_size is of type int, which makes no sense as we +will never have a valid cache size equal or less than 0. So instead of +initializing this variable to -1, it can perfectly be initialized to 0 +and use it as an unsigned variable instead. + +Suggested-by: Thomas Gleixner <tglx@linutronix.de> +Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> +Cc: Borislav Petkov <bp@alien8.de> +Cc: Linus Torvalds <torvalds@linux-foundation.org> +Cc: Peter Zijlstra <peterz@infradead.org> +Addresses-Coverity-ID: 1464429 +Link: http://lkml.kernel.org/r/20180213192208.GA26414@embeddedor.com +Signed-off-by: Ingo Molnar <mingo@kernel.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/include/asm/processor.h | 2 +- + arch/x86/kernel/cpu/common.c | 2 +- + arch/x86/kernel/cpu/proc.c | 4 ++-- + 3 files changed, 4 insertions(+), 4 deletions(-) + +diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h +index df29212..d51e679 100644 +--- a/arch/x86/include/asm/processor.h ++++ b/arch/x86/include/asm/processor.h +@@ -113,7 +113,7 @@ struct cpuinfo_x86 { + char x86_vendor_id[16]; + char x86_model_id[64]; + /* in KB - valid for CPUS which support this call: */ +- int x86_cache_size; ++ unsigned int x86_cache_size; + int x86_cache_alignment; /* In bytes */ + /* Cache QoS architectural values: */ + int x86_cache_max_rmid; /* max index */ +diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c +index 96b2c83..301bbd1 100644 +--- a/arch/x86/kernel/cpu/common.c ++++ b/arch/x86/kernel/cpu/common.c +@@ -1144,7 +1144,7 @@ static void identify_cpu(struct cpuinfo_x86 *c) + int i; + + c->loops_per_jiffy = loops_per_jiffy; +- c->x86_cache_size = -1; ++ c->x86_cache_size = 0; + c->x86_vendor = X86_VENDOR_UNKNOWN; + c->x86_model = c->x86_stepping = 0; /* So far unknown... */ + c->x86_vendor_id[0] = '\0'; /* Unset */ +diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c +index 9e817f2..c4f772d 100644 +--- a/arch/x86/kernel/cpu/proc.c ++++ b/arch/x86/kernel/cpu/proc.c +@@ -87,8 +87,8 @@ static int show_cpuinfo(struct seq_file *m, void *v) + } + + /* Cache size */ +- if (c->x86_cache_size >= 0) +- seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); ++ if (c->x86_cache_size) ++ seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size); + + show_cpuinfo_core(m, c, cpu); + show_cpuinfo_misc(m, c); +-- +2.7.4 + |