diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-12-08 00:50:22 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-08 13:49:45 +0100 |
| commit | 3e1e9002aa8b32bd4c95ac6c8fad376b7a8127fb (patch) | |
| tree | f9cee272743423033e78d283955aa7c493691a2d /arch/x86/include/asm/trampoline.h | |
| parent | Fix a race condition in FASYNC handling (diff) | |
| download | linux-3e1e9002aa8b32bd4c95ac6c8fad376b7a8127fb.tar.xz linux-3e1e9002aa8b32bd4c95ac6c8fad376b7a8127fb.zip | |
x86: change static allocation of trampoline area
Impact: fix trampoline sizing bug, save space
While debugging a suspend-to-RAM related issue it occured to me that
if the trampoline code had grown past 4 KB, we would have been
allocating too little memory for it, since the 4 KB size of the
trampoline is hardcoded into arch/x86/kernel/e820.c . Change that
by making the kernel compute the trampoline size and allocate as much
memory as necessary.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/trampoline.h')
| -rw-r--r-- | arch/x86/include/asm/trampoline.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/trampoline.h b/arch/x86/include/asm/trampoline.h index fa0d79facdbc..780ba0ab94f9 100644 --- a/arch/x86/include/asm/trampoline.h +++ b/arch/x86/include/asm/trampoline.h @@ -3,6 +3,7 @@ #ifndef __ASSEMBLY__ +#ifdef CONFIG_X86_TRAMPOLINE /* * Trampoline 80x86 program as an array. */ @@ -13,8 +14,14 @@ extern unsigned char *trampoline_base; extern unsigned long init_rsp; extern unsigned long initial_code; +#define TRAMPOLINE_SIZE roundup(trampoline_end - trampoline_data, PAGE_SIZE) #define TRAMPOLINE_BASE 0x6000 + extern unsigned long setup_trampoline(void); +extern void __init reserve_trampoline_memory(void); +#else +static inline void reserve_trampoline_memory(void) {}; +#endif /* CONFIG_X86_TRAMPOLINE */ #endif /* __ASSEMBLY__ */ |