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| author | Jordan Borgner <mail@jordan-borgner.de> | 2018-11-02 15:56:22 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-11-06 21:05:01 +0100 |
| commit | e8eeb3c8aab044ee8faf5e0389db8518629a9324 (patch) | |
| tree | 3a971ce6498b82dedd90fb20fef3904297653504 /arch/x86/boot | |
| parent | compiler: remove __no_sanitize_address_or_inline again (diff) | |
| download | linux-e8eeb3c8aab044ee8faf5e0389db8518629a9324.tar.xz linux-e8eeb3c8aab044ee8faf5e0389db8518629a9324.zip | |
x86/boot: Simplify the detect_memory*() control flow
The return values of these functions are not used - so simplify the functions.
No change in functionality.
[ mingo: Simplified the changelog. ]
Suggested: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Jordan Borgner <mail@jordan-borgner.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20181102145622.zjx2t3mdu3rv6sgy@JordanDesktop
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/boot.h | 2 | ||||
| -rw-r--r-- | arch/x86/boot/memory.c | 31 |
2 files changed, 11 insertions, 22 deletions
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h index ef5a9cc66fb8..32a09eb5c101 100644 --- a/arch/x86/boot/boot.h +++ b/arch/x86/boot/boot.h @@ -309,7 +309,7 @@ void query_edd(void); void __attribute__((noreturn)) die(void); /* memory.c */ -int detect_memory(void); +void detect_memory(void); /* pm.c */ void __attribute__((noreturn)) go_to_protected_mode(void); diff --git a/arch/x86/boot/memory.c b/arch/x86/boot/memory.c index 7df2b28207be..f06c147b5140 100644 --- a/arch/x86/boot/memory.c +++ b/arch/x86/boot/memory.c @@ -17,7 +17,7 @@ #define SMAP 0x534d4150 /* ASCII "SMAP" */ -static int detect_memory_e820(void) +static void detect_memory_e820(void) { int count = 0; struct biosregs ireg, oreg; @@ -68,10 +68,10 @@ static int detect_memory_e820(void) count++; } while (ireg.ebx && count < ARRAY_SIZE(boot_params.e820_table)); - return boot_params.e820_entries = count; + boot_params.e820_entries = count; } -static int detect_memory_e801(void) +static void detect_memory_e801(void) { struct biosregs ireg, oreg; @@ -80,7 +80,7 @@ static int detect_memory_e801(void) intcall(0x15, &ireg, &oreg); if (oreg.eflags & X86_EFLAGS_CF) - return -1; + return; /* Do we really need to do this? */ if (oreg.cx || oreg.dx) { @@ -89,7 +89,7 @@ static int detect_memory_e801(void) } if (oreg.ax > 15*1024) { - return -1; /* Bogus! */ + return; /* Bogus! */ } else if (oreg.ax == 15*1024) { boot_params.alt_mem_k = (oreg.bx << 6) + oreg.ax; } else { @@ -102,11 +102,9 @@ static int detect_memory_e801(void) */ boot_params.alt_mem_k = oreg.ax; } - - return 0; } -static int detect_memory_88(void) +static void detect_memory_88(void) { struct biosregs ireg, oreg; @@ -115,22 +113,13 @@ static int detect_memory_88(void) intcall(0x15, &ireg, &oreg); boot_params.screen_info.ext_mem_k = oreg.ax; - - return -(oreg.eflags & X86_EFLAGS_CF); /* 0 or -1 */ } -int detect_memory(void) +void detect_memory(void) { - int err = -1; - - if (detect_memory_e820() > 0) - err = 0; - - if (!detect_memory_e801()) - err = 0; + detect_memory_e820(); - if (!detect_memory_88()) - err = 0; + detect_memory_e801(); - return err; + detect_memory_88(); } |