Revision 531c221df182af5a7fc2bf7ba7eee89354fe9a10 authored by Ingo Molnar on 16 June 2017, 19:33:48 UTC, committed by Ingo Molnar on 16 June 2017, 19:33:48 UTC
Pull perf/urgent fixes from Arnaldo Carvalho de Melo: - Fix probing of precise_ip level for default cycles event, that got broken recently on x86_64 when its arch code started considering invalid requesting precise samples when not sampling (i.e. when attr.sample_period == 0). This also fixes another problem in s/390 where the precision probing with sample_period == 0 returned precise_ip > 0, that then, when setting up the real cycles event (not probing) would return EOPNOTSUPP for precise_ip > 0 (as determined previously by probing) and sample_period > 0. These problems resulted in attr_precise not being set to the highest precision available on x86.64 when no event was specified, i.e. the canonical: perf record ./workload would end up using attr.precise_ip = 0. As a workaround this would need to be done: perf record -e cycles:P ./workload And on s/390 it would plain not work, requiring using: perf record -e cycles ./workload as a workaround. (Arnaldo Carvalho de Melo) - Fix perf build with ARCH=x86_64, when ARCH should be transformed into ARCH=x86, just like with the main kernel Makefile and tools/objtool's, i.e. use SRCARCH. (Jiada Wang) - Avoid accessing uninitialized data structures when unwinding with elfutils's libdw, making it more closely mimic libunwind's unwinder. (Milian Wolff) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
endian.h
/*
* linux/fs/befs/endian.h
*
* Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
*
* Partially based on similar funtions in the sysv driver.
*/
#ifndef LINUX_BEFS_ENDIAN
#define LINUX_BEFS_ENDIAN
#include <asm/byteorder.h>
static inline u64
fs64_to_cpu(const struct super_block *sb, fs64 n)
{
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
return le64_to_cpu((__force __le64)n);
else
return be64_to_cpu((__force __be64)n);
}
static inline fs64
cpu_to_fs64(const struct super_block *sb, u64 n)
{
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
return (__force fs64)cpu_to_le64(n);
else
return (__force fs64)cpu_to_be64(n);
}
static inline u32
fs32_to_cpu(const struct super_block *sb, fs32 n)
{
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
return le32_to_cpu((__force __le32)n);
else
return be32_to_cpu((__force __be32)n);
}
static inline fs32
cpu_to_fs32(const struct super_block *sb, u32 n)
{
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
return (__force fs32)cpu_to_le32(n);
else
return (__force fs32)cpu_to_be32(n);
}
static inline u16
fs16_to_cpu(const struct super_block *sb, fs16 n)
{
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
return le16_to_cpu((__force __le16)n);
else
return be16_to_cpu((__force __be16)n);
}
static inline fs16
cpu_to_fs16(const struct super_block *sb, u16 n)
{
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
return (__force fs16)cpu_to_le16(n);
else
return (__force fs16)cpu_to_be16(n);
}
/* Composite types below here */
static inline befs_block_run
fsrun_to_cpu(const struct super_block *sb, befs_disk_block_run n)
{
befs_block_run run;
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
run.allocation_group = le32_to_cpu((__force __le32)n.allocation_group);
run.start = le16_to_cpu((__force __le16)n.start);
run.len = le16_to_cpu((__force __le16)n.len);
} else {
run.allocation_group = be32_to_cpu((__force __be32)n.allocation_group);
run.start = be16_to_cpu((__force __be16)n.start);
run.len = be16_to_cpu((__force __be16)n.len);
}
return run;
}
static inline befs_disk_block_run
cpu_to_fsrun(const struct super_block *sb, befs_block_run n)
{
befs_disk_block_run run;
if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
run.allocation_group = cpu_to_le32(n.allocation_group);
run.start = cpu_to_le16(n.start);
run.len = cpu_to_le16(n.len);
} else {
run.allocation_group = cpu_to_be32(n.allocation_group);
run.start = cpu_to_be16(n.start);
run.len = cpu_to_be16(n.len);
}
return run;
}
static inline befs_data_stream
fsds_to_cpu(const struct super_block *sb, const befs_disk_data_stream *n)
{
befs_data_stream data;
int i;
for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i)
data.direct[i] = fsrun_to_cpu(sb, n->direct[i]);
data.max_direct_range = fs64_to_cpu(sb, n->max_direct_range);
data.indirect = fsrun_to_cpu(sb, n->indirect);
data.max_indirect_range = fs64_to_cpu(sb, n->max_indirect_range);
data.double_indirect = fsrun_to_cpu(sb, n->double_indirect);
data.max_double_indirect_range = fs64_to_cpu(sb,
n->
max_double_indirect_range);
data.size = fs64_to_cpu(sb, n->size);
return data;
}
#endif //LINUX_BEFS_ENDIAN
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