#ifndef __ASM_GENERIC_EXPORT_H #define __ASM_GENERIC_EXPORT_H #ifndef KSYM_FUNC #define KSYM_FUNC(x) x #endif #ifdef CONFIG_64BIT #define __put .quad #ifndef KSYM_ALIGN #define KSYM_ALIGN 8 #endif #else #define __put .long #ifndef KSYM_ALIGN #define KSYM_ALIGN 4 #endif #endif #ifndef KCRC_ALIGN #define KCRC_ALIGN 4 #endif #ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX #define KSYM(name) _##name #else #define KSYM(name) name #endif /* * note on .section use: @progbits vs %progbits nastiness doesn't matter, * since we immediately emit into those sections anyway. */ .macro ___EXPORT_SYMBOL name,val,sec #ifdef CONFIG_MODULES .globl KSYM(__ksymtab_\name) .section ___ksymtab\sec+\name,"a" .balign KSYM_ALIGN KSYM(__ksymtab_\name): __put \val, KSYM(__kstrtab_\name) .previous .section __ksymtab_strings,"a" KSYM(__kstrtab_\name): #ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX .asciz "_\name" #else .asciz "\name" #endif .previous #ifdef CONFIG_MODVERSIONS .section ___kcrctab\sec+\name,"a" .balign KCRC_ALIGN KSYM(__kcrctab_\name): #if defined(CONFIG_MODULE_REL_CRCS) .long KSYM(__crc_\name) - . #else .long KSYM(__crc_\name) #endif .weak KSYM(__crc_\name) .previous #endif #endif .endm #undef __put #if defined(__KSYM_DEPS__) #define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym === #elif defined(CONFIG_TRIM_UNUSED_KSYMS) #include #include #define __EXPORT_SYMBOL(sym, val, sec) \ __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) #define __cond_export_sym(sym, val, sec, conf) \ ___cond_export_sym(sym, val, sec, conf) #define ___cond_export_sym(sym, val, sec, enabled) \ __cond_export_sym_##enabled(sym, val, sec) #define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec #define __cond_export_sym_0(sym, val, sec) /* nothing */ #else #define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec #endif #define EXPORT_SYMBOL(name) \ __EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)),) #define EXPORT_SYMBOL_GPL(name) \ __EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)), _gpl) #define EXPORT_DATA_SYMBOL(name) \ __EXPORT_SYMBOL(name, KSYM(name),) #define EXPORT_DATA_SYMBOL_GPL(name) \ __EXPORT_SYMBOL(name, KSYM(name),_gpl) #endif ff/drivers/usb/host/u132-hcd.c?h=nds-private-remove&id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>diff
path: root/drivers/usb/host/u132-hcd.c
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
committerTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
commit07cd12945551b63ecb1a349d50a6d69d1d6feb4a (patch)
tree75f65eba7eac9277971082a2d5a4cf1370562c0c /drivers/usb/host/u132-hcd.c
parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems before the new cgroup is associated with it kernfs_node. This is fine for cgroup proper but cgroup_name/path() depend on the associated kernfs_node and if a subsystem makes the new cgroup_subsys_state visible, which they're allowed to after onlining, it can lead to NULL dereference. The current code performs cgroup creation and subsystem onlining in cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems visible afterwards. There's no reason to online the subsystems early and we can simply drop cgroup_apply_control_enable() call from cgroup_create() so that the subsystems are onlined and made visible at the same time. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") Cc: stable@vger.kernel.org # v4.6+
Diffstat (limited to 'drivers/usb/host/u132-hcd.c')