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Description of problem:
Performing a suspend to disk (echo -n disk > /sys/power/status) causes a kernel panic.  The mark_swapfiles (kernel/power/swap.c) function is passing an incorrect page address to rw_swap_page_sync.  There are two address spaces in the x86_64 kernel, __PAGE_OFFSET and __START_KERNEL_map; the __pa macro (include/asm-x86_64/page.h) does not properly handle this.

Version-Release number of selected component (if applicable):
kernel-2.6.18-2839.el5

How reproducible:
Always


Steps to Reproduce:
1.Install RHEL5 beta2 x86-64 kernel
2.Perform suspenmd to disk (echo -n disk > /sys/power/state)
3.System will panic

Actual Results:


Expected Results:


Additional info:
The bug exists in include/asm-x86_64/page.h in the __pa macro.  It does not properly handle addresses above __START_KERNEL_map.

From kernel.org source:
112 /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
113    Otherwise you risk miscompilation. */ 
114 #define __pa(x)                 (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
115 /* __pa_symbol should be used for C visible symbols.
116    This seems to be the official gcc blessed way to do such arithmetic. */ 
117 #define __pa_symbol(x)          \
118         ({unsigned long v;  \
119           asm("" : "=r" (v) : "" (x)); \
120           __pa(v); })