Messages in this thread Patch in this message | | | Subject | [PATCH] kexec jump: fix compiling warning on xchg(&kexec_lock, 0) in kernel_kexec() | From | Huang Ying <> | Date | Wed, 13 Aug 2008 17:12:40 +0800 |
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Fix compiling warning on xchg(&kexec_lock, 0) in kernel_kexec().
Signed-off-by: Huang Ying <ying.huang@intel.com>
--- kernel/kexec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -1433,6 +1433,7 @@ module_init(crash_save_vmcoreinfo_init) int kernel_kexec(void) { int error = 0; + int locked; if (xchg(&kexec_lock, 1)) return -EBUSY; @@ -1498,7 +1499,8 @@ int kernel_kexec(void) #endif Unlock: - xchg(&kexec_lock, 0); + locked = xchg(&kexec_lock, 0); + BUG_ON(!locked); return error; }
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